Hotkey: Add next/previous to timeshift/movieplayer exception keys

Thanks Satkiekerd
Add sanity check for tuners with an empty sat list.

Signed-off-by: littlesat <littlesat99@yahoo.com>
Add new PluginDescriptor WHERE_CHANNEL_CONTEXT_MENU

Signed-off-by: Littlesat <Littlesat99@yahoo.com>
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2

Resolved Conflicts:
	lib/python/Plugins/Plugin.py
Hotkey: Add hotkey function showServiceListOrMovies
Update ISO639.py
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2
Merge branch 'master' of openmips-e2