slimCat Ocelot rc2.20

-staring to move away from data templates
-channel and session buttons are now simple links and are visually
distinct due to the channel earmarker by their side
-fixed a crash when bbcode with an unknown color was presented
-fixed an issue where it was not possible to left *or* right click
anything in the notifications tab
-starting to clean up view files and code-behind that uses flowdocuments