Mobile virtual keyboard fixes, plus font

Missed in conflicted merge

This is to toggle off help view when clicking on items on the map and checking the appropriate buttons accordingly.

Made map buttons toggle between black and orange.

Merge remote-tracking branch 'mavlink/master' into toggleMapButtons

* mavlink/master:
  UAS: Improve HIL inputs
  More work on waypoint lines

Conflicts:
	src/MissionEditor/MissionEditor.qml

More work on waypoint lines

* mavlink/master:
  Increase size of controls for tablet
  Make sync warning less tall
  Use Flickable to allow scroll on Tablet
  More header fixes for Mobile build
  More header moves for Mobile build
  More header moves for no widgets in Mobile build
  Move widget controllers out of Mobile build
  QGCUnconnectedInfoWidget needed in Mobile builds
  Remove widget code from Mobile builds

Also handling the toggling of the various panes on the right side of the screen to match the current selected task.

Tablet usability fixes

Remove Dock Widget code from mobile builds

Adjusted icons so they no longer contain a background.
Added *Exclusive* functionality to the RoundButton element.
Added OnClicked signal for the drop down boxes so I could turn off Add Mission Item and Home Mode.

Adding a RoundButton element.

Made then the same size of toolbar cell height

Also moving the Plan View tool bar buttons into a Row element.

Zoom buttons back on

Plan View Tweaks

Adding *Home* icon for Don.

Replacing some icons, cleaning up help text, etc.

Pinch zoom doesn’t seem to be working for some reason

quick fix for yaw axis calibration issue

Fix the joystick range by properly limiting the calculation