Fixes 934
Fixed tabs
All firmware selections have been removed from the download dialog.
A consequence is that it is always possible to try to download voice files. Even for those boards that have no voice capability. I do not think that is a big problem. Anyone trying to download voice files for a unmodified 9x should not be surprised to get a "file not found" browser message.
Merge pull request #989 from aaronchch/aaronchch/heli_issue_934

Aaronchch/heli issue 934
Merge pull request #991 from opentx/dvogonen/move_firmware_selection_settings_988

Dvogonen/move firmware selection settings 988
Merge remote-tracking branch 'origin/next' into
bsongis/refactoring_firmware_interface

Conflicts:
	companion/src/fwpreferencesdialog.cpp
	companion/src/fwpreferencesdialog.h
	companion/src/fwpreferencesdialog.ui