rearrange SlimChannelSelection

Move the event start and end time displays, and the event FullDescription
displays so that they fit correctly into the screen.

The event start and end time displays were overlapping the RED
button hint, and the FullDescription display was outside the screen
boundaries.

Reduced the height of the FullDescription widget so that it fits
into the display and doesn't show partial lines.
Merge pull request #2 from prl001/fix-SlimChannelSelection

rearrange SlimChannelSelection