Tvheadend

When mapping services to channels we rely on exact matching of channel names.

This means that "Channel 5" does not merge with "Channel 5 HD" meaning that we have to merge them manually if we want the "preferred service video type" to work.

Additionally DVB-T and DVB-S sometimes use different names for the same channel, differing in case and spacing. So we have "Channel 5 +1", "Channel 5+1", "ONE" and "One", "5HD" and "5 HD".

So add a new checkbox to "map services" dialog to optionally ignore spacing and case and strip a trailing "HD" from the channel names for compares. This results in more services matches so all the following will merge in to one channel: "Channel 4+1", "Channel 4 +1", "Channel 4+1HD", "Channel 4+1 HD". The exact name chosen for the channel will depend on mapping order but it could be subsequently edited by the user if they have a preference for spacing.