OP-1174 uploader gadget - removed popup to disconnect when using auto update.
Fix also applies to vehicule setup wizard autoupdate page
Instead of using a popup that requires user to click Ok, GCS will wait untill all boards are disconnected
This fix induces lots of cleanups.
OP-1174 wizard upgrade page - removed now uneeded fix that caused the wizard dialog to flicker
OP-1174 wizard upgrade page - made all strings translatable
OP-1174 uploader gadget - removed deprecated code and minor renaming
OP-1174 uploader gadget - made all strings translatable