• Panasonic: fixed error reading lists with channels that refer to non-existing transponders
• Philips ChannelMap_45: incrementing fav list version number when saving and setting the last_watched_channel_id to
  the first channel in the fav list (ensuring that the channel is actually present in the list)
• UI: added search button (because it is not obvious that the top row of the table is a search/filter row)