Plus low battery announce changes

Renamed main activity class with a more appropriate name.

Also made combo box widths larger to accommodate text

Remove showSensorCalibrationOrient

Plus fixed a bunch of bugs

Changed (selected) mission item color to primaryButton instead of buttonHighlight
Adjusted some colors for better contrast
Removed a few JavaScript exceptions caused by the order of object destruction

Revert "Removed code that cut off the last 25% of joystick motion in either direction. I'm not sure what the original purpose of this code was."

This reverts commit 4c34fb38.