Tilt support in breadboard + display of accelerometer values (#1379)

* remove disable tilt option

* allow tilting when breadboard is up (music speakers)

* display acceleration

* only showing acc values if read

sim/visuals/boardview.ts

@@ -3,7 +3,6 @@ namespace pxsim.visuals {
         return new visuals.MicrobitBoardSvg({
             runtime: runtime,
             theme: visuals.randomTheme(opts.highContrast),
-            disableTilt: false,
             wireframe: opts.wireframe
         });
     }