Visual accel cal

Fixed flight widget position.

Get rid of QGCView, QGCViewPanel and FactPanel. All messages and dialogs are now handled in the root window.

Support COMPASS_AUTO_ROT==2 for orientations set automatically.

Fix Reboot and Waiting for Cancel

Also added new FirmwarePlugin::brandImage support

width/height must be specified by user name

Android done.

Change all text to have a qsTr call, this way it will
call the right translated text when needed.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

- Sensors summary now shows you how man compasses you have
- Fix for APM accel cal. Can only use first accel offsets.

Add scroll height indicators to Flickable