pxt-microbit Accessibility PR (#529)

* Accessibility changes

docs/reference/devices/on-gamepad-button.md

@@ -2,22 +2,22 @@
 
 Register code to run when the @boardname@ receives a command from the paired gamepad.
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 ```sig
 devices.onGamepadButton(MesDpadButtonInfo.ADown, () => {})
 ```
 
-### Parameters
+## Parameters
 
 * ``body``: Action code to run when the the @boardname@ receives a command from the paired gamepad.
 
-### See Also
+## See Also
 
 [tell remote control to](/reference/devices/tell-remote-control-to), [raise alert to](/reference/devices/raise-alert-to), [signal strength](/reference/devices/signal-strength), [on signal strength changed](/reference/devices/on-signal-strength-changed)
 

docs/reference/devices/on-notified.md

@@ -2,12 +2,12 @@
 
 Register code to run when the signal strength of the paired device changes.
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 
 
@@ -15,11 +15,11 @@ For another device like a smartphone to use any of the Bluetooth "services" whic
 devices.onNotified(MesDeviceInfo.IncomingCall, () => {})
 ```
 
-### Parameters
+## Parameters
 
 * ``body``: code to run when the signal strength changes.
 
-### Examples
+## Examples
 
 Display the signal strength on screen:
 
@@ -29,7 +29,7 @@ devices.onNotified(MesDeviceInfo.IncomingCall, () => {
 })
 ```
 
-### See Also
+## See Also
 
 [tell remote control to](/reference/devices/tell-remote-control-to), [raise alert to](/reference/devices/raise-alert-to), [signal strength](/reference/devices/signal-strength)
 

docs/reference/devices/on-signal-strength-changed.md

@@ -2,12 +2,12 @@
 
 Register code to run when the signal strength of the paired device changes.
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 
 
@@ -15,11 +15,11 @@ For another device like a smartphone to use any of the Bluetooth "services" whic
 devices.onSignalStrengthChanged(() => {})
 ```
 
-### Parameters
+## Parameters
 
 * ``body``: code to run when the signal strength changes.
 
-### Examples
+## Examples
 
 Display the signal strength on screen:
 
@@ -29,7 +29,7 @@ devices.onSignalStrengthChanged(() => {
 })
 ```
 
-### See Also
+## See Also
 
 [tell remote control to](/reference/devices/tell-remote-control-to), [raise alert to](/reference/devices/raise-alert-to), [signal strength](/reference/devices/signal-strength)
 

docs/reference/devices/raise-alert-to.md

@@ -2,12 +2,12 @@
 
 Raise an alert on a remote device.
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 
 
@@ -15,11 +15,11 @@ For another device like a smartphone to use any of the Bluetooth "services" whic
 devices.raiseAlertTo(MesAlertEvent.Vibrate)
 ```
 
-### Parameters
+## Parameters
 
 * event - an event identifier
 
-### Examples
+## Examples
 
 To tell the connected device to display toast
 
@@ -57,7 +57,7 @@ To tell the connected device to ring alarm
 devices.raiseAlertTo(MesAlertEvent.RingAlarm)
 ```
 
-### See also
+## See also
 
 [tell remote control to](/reference/devices/tell-remote-control-to), [tell camera to](/reference/devices/tell-camera-to)
 

docs/reference/devices/signal-strength.md

@@ -2,23 +2,23 @@
 
 Returns the signal strength reported by the paired device from ``0`` (no signal) to ``4`` (full strength).
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 
 ```sig
 devices.signalStrength();
 ```
 
-### Returns
+## Returns
 
 * the signal strength from ``0`` (no signal) to ``4`` (full strength).
 
-### Examples
+## Examples
 
 Display the signal strength on screen:
 
@@ -28,7 +28,7 @@ devices.onSignalStrengthChanged(() => {
 })
 ```
 
-### See Also
+## See Also
 
 [tell remote control to](/reference/devices/tell-remote-control-to), [raise alert to](/reference/devices/raise-alert-to), [on signal strength changed](/reference/devices/on-signal-strength-changed)
 

docs/reference/devices/tell-camera-to.md

@@ -2,23 +2,23 @@
 
 Access the photo/video-taking functionality of a remote device using the ``tell camera to`` function.
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 
 ```sig
 devices.tellCameraTo(MesCameraEvent.TakePhoto)
 ```
 
-### Parameters
+## Parameters
 
 * event - an event identifier
 
-### Examples
+## Examples
 
 To tell the connected device to take a picture:
 
@@ -68,7 +68,7 @@ To tell the connected device to stop video mode
 devices.tellCameraTo(MesCameraEvent.StopVideoMode)
 ```
 
-### See Also
+## See Also
 
 [tell remote control to](/reference/devices/tell-remote-control-to), [raise alert to](/reference/devices/raise-alert-to)
 

docs/reference/devices/tell-remote-control-to.md

@@ -2,23 +2,23 @@
 
 Control the presentation of media content available on a remote device using the `tell remote control` to function.
 
-### ~hint
+## ~hint
 ![](/static/bluetooth/Bluetooth_SIG.png)
 
 For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be [paired with the @boardname@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
 
-### ~
+## ~
 
 
 ```sig
 devices.tellRemoteControlTo(MesRemoteControlEvent.play)
 ```
 
-### Parameters
+## Parameters
 
 * event - an event identifier
 
-### Event values
+## Event values
 
 * play
 * stop
@@ -30,7 +30,7 @@ devices.tellRemoteControlTo(MesRemoteControlEvent.play)
 * previous track
 * next track
 
-### Examples
+## Examples
 
 To tell the connected device to start playing:
 
@@ -80,7 +80,7 @@ To tell the connected device volume down
 devices.tellRemoteControlTo(MesRemoteControlEvent.volumeDown)
 ```
 
-### See also
+## See also
 
 [tell camera to](/reference/devices/tell-camera-to), [raise alert to](/reference/devices/raise-alert-to)