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.

Sensitivity of axis increases and deadband increases. This fixes an issue where the maximum percent output from an axis would be 100% - percentDeadband.

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.

Some android versions leave a focus arrow indicator turd in the
control. This gets rid of it.

This reverts commit 7131a12e.

Previous mechanism was exposing possible bug in Qt which would prevent
clicks from work on ToolStrip buttons after cancel MouseArea was hidden.

Also correctly set implicitHeight on QGCTextField