NimManager: show DVB-T2 / DVB-S2 in multi-type NIM selection

We used to show DVB-T / DVB-S, even if a NIM supported T2 / S2
This did not allow us to use NIM.isCompatible, because
though DVB-S is compatible with DVB-S2, DVB-S2 is not
necessarily compatible with DVB-S.
ScanSetup: add system selection in DVB-T single transponder scan

also, add PLP setting when DVB-T2 is selected
added option for autoturn on,off pango subtitles

Signed-off-by: Littlesat <littlesat99@yahoo.com>
Merge remote-tracking branch 'pli/master'

Conflicts:
	lib/python/Components/NimManager.py
	lib/python/Screens/ScanSetup.py