Don't use native widget siblings

QQuickWidget can’t handle this
Remove bad ICC from splash png
Fix inner root qml object sizing
Remove bad ICC
Disable Google Earth

Adding Issue #1157 to put back
Merge pull request #1153 from DonLakeFlyer/QQuickWidgetFix

Don't use native widget siblings
Merge remote-tracking branch 'upstream/master' into master.

Conflicts:
	src/QGCApplication.cc