various docs fixes

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

@@ -8,14 +8,9 @@ The functions in the ``devices`` namespace allow the BBC micro:bit to communicat
 
 The set of supported events will depend on the remote device and the BBC micro:bit apps available for the remote device.
 
-### Block Editor
 
-![](/static/mb/on-gamepad-button-0.png)
-
-### KindScript
-
-```
-export function onGamepadButton(name: string, body:td.Action)
+```sig
+devices.onGamepadButton(MesDpadButtonInfo.ADown, () => {})
 ```
 
 ### Parameters

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

@@ -10,14 +10,8 @@ The functions in the ``devices`` namespace allow the BBC micro:bit to communicat
 
 The set of supported events will depend on the remote device and the BBC micro:bit apps available for the remote device.
 
-### Block Editor
-
-![](/static/mb/on-signal-strength-changed-0.png)
-
-### KindScript
-
-```
-export function onSignalStrengthChanged(body:td.Action)
+```sig
+devices.onSignalStrengthChanged(() => {})
 ```
 
 ### Parameters

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

@@ -4,19 +4,14 @@ The raise alert to function.
 
 Raise an alert on a remote device.
 
-## 
+## Bluetooth required
 
 The functions in the ``devices`` namespace allow the BBC micro:bit to communicate with a separate (remote) device, such as a smartphone, over Bluetooth (Smart).
 
 The set of supported events will depend on the remote device and the BBC micro:bit apps available for the remote device.
 
-### KindScript
 
-![](/static/mb/raise-alert-to-0.png)
-
-### KindScript
-
-```
+```sig
 export function raiseAlertTo(event: string)
 ```
 

docs/reference/devices/receive-number.md

@@ -12,14 +12,8 @@ This API does not contain any form of encryption, authentication or authorizatio
 
 For serious applications, BLE should be considered a substantially more secure alternative.
 
-### Block Editor
-
-![](/static/mb/receive-number-0.png)
-
-### KindScript
-
-```
-export function receiveNumber() : number
+```sig
+radio.receiveNumber();
 ```
 
 ### Returns

docs/reference/devices/signal-strength.md

@@ -4,20 +4,14 @@ The `signal strength` function.
 
 Returns the signal strength reported by the paired device from ``0`` (no signal) to ``4`` (full strength).
 
-## Bluetooth required
+## Important Security Consideration
 
 The functions in the ``devices`` namespace allow the BBC micro:bit to communicate with a separate (remote) device, such as a smartphone, over Bluetooth (Smart).
 
 The set of supported events will depend on the remote device and the BBC micro:bit apps available for the remote device.
 
-### Block Editor
-
-![](/static/mb/signal-strength-0.png)
-
-### KindScript
-
 ```
-export function signalStrength() : number
+devices.signalStrength() : number
 ```
 
 ### Returns