Update ChannelSelection.py

  File "/usr/lib/enigma2/python/Screens/ChannelSelection.py", line 2195, in channelSelected
  File "/usr/lib/enigma2/python/Screens/ChannelSelection.py", line 1550, in gotoCurrentServiceOrProvider
AttributeError: 'SimpleChannelSelection' object has no attribute 'bouquet_mark_edit'
Merge pull request #19 from arn354/patch-6

Update ChannelSelection.py