Also added new FirmwarePlugin::brandImage support

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

Too complicated supporting both modes as editor becomes more complex

- You can now cancel parameter change
- Tablete friendly