UI log changes.

Only show the logging from current run.
Added "select log level" to filter levels.

I think this is a better approach. Reading the file worked, but it was hard to filter through to find anything.

On a related note:
I'm also unsure about the pastebin button since my log file exceeds their max filesize. Maybe we should handle logs the same way xbmc does (log each run in a new file and move the last run to maraschino.old)?