camera: initial PBO support, mode probing
camera controls
progress
set/get props, cleanup
support for hiding in tray

also new setting, autostart in tray
cleanup
volume stubs
cleanup, split
renamed SelfCamView to VideoSurface
protect Camera::getLastVPXImage()
fix
Update Ukrainian translation
Merge pull request #413 from burunduk/master

Update Ukrainian translation
Merge pull request #409 from agilob/trayicon

support for hiding in tray
Merge pull request #410 from krepa098/camera

Improved (self) camera