Copter 3.7 CH#_OPT -> RC#_OPTION name change

Also added new FirmwarePlugin::brandImage support

Channel 6 Min Max

Channel 6 Tuning for APM Copter in tuning section

Remove Colon in Label

In Flight Tuning label

UI Tweaks for all mobile platforms.

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>

Add scroll height indicators to Flickable