Arrange that some EPG events may have more then one clock icon

In some circomstances it could be that we should have more than one clock
icon within an EPG event. Currently we only could give one which was most
likely the last one detived from the recordingslist.
Make from the types returned by RecordTimer.py a list so we can handle
more clock icons for each EPG event (e.g. in the GMEPG and EPGList).