Crashes in EPG if HDMI IN is in current bouquet

If HDMI IN is in the current bouquet and either REC (instant timer) or GREEN Change Timer (not GREEN Add Timer) is pressed, the UI will crash if the service in focus is after HDMI IN in the bouquet order. The functions work properly if the service in focus is before HDMI IN in the list.

The problem is due to EPGList.getIndexFromService() returning None if a non-DVB TV service (service type != 1) is encountered in the service list before the service in EPG focus is found.

EPGList.getSelectionPosition() is also too fragile and doesn't fall back gracefully if getIndexFromService() returns None.

Replication steps

Add HDMI IN to some convenient bouquet (e.g. Favourites (TV)), and move it so it is part-way down the service list, with some DVB services both before and after it.

Then, from live TV, press EPG.

In the EPG, navigate to a service before (above) HDMI IN in the EPG screen and to an event with no timer active for it.

Press REC: normal Add Timer/Add AutoTimer popup menu. EXIT to cancel the recording request.

Navigate to an event without a timer in a service after (below) HDMI IN.

Press REC. Crash.

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