Introduce numberzap functionality in channelselection screen

This means the hotkeys numbers cannot be used anymore as the numberkeys
are needed for the numberzap. But in the contextmenu we also have these
hotkeys recently. Also replaced focus to currently played service to the
contextmenu. Did not add the focus to latest service in history. I suggest
this was somehow useless. In addition I added a confirmation before
service delete as it was on the hotkey.
Enable numberzap in radio and simple service selection
Correctly show and hide infoscreen in radio channel selection

As the context menu could not be fully displayed in this mode
Correct channel number when coming from ChannelSelectionRadio
Remove not required double declaration of GUI_WIDGET in progress renderer
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2 into BETA

Resolved Conflicts:
	lib/python/Screens/ChannelSelection.py