ChannelSelection: Allow column width of 0

So you can only see picons with the event description. This was requested
several times http://forums.openpli.org/topic/35277-hide-channel-name-in-favorites-channelselection/
Removed the device option. I suggest deviding them by number of pixels in
steps of 100 should be fine.
servicemp3: simplify finding audio/video sinks

using gst_bin_get_by_name_recurse_up,
as suggested by theparasol

Works for all gstreamer versions, avoiding
precompiler conditionals
servicemp3: Use GST_BUFFER_PTS instead of deprecated GST_BUFFER_TIMESTAMP on gstreamer1.0

http://forums.openpli.org/topic/32320-unable-to-compile-gst-10-branch/page-8
servicemp3: fix pullSubtitle for GStreamer 1.0

http://forums.openpli.org/topic/32320-unable-to-compile-gst-10-branch/page-8