Changed scaling/borders of gui

> scales to 80% screen width/height.
> Removed borders. think it looks nicer.

TODO:
> Change fonts according to screen size.
> Implement extra tabs + scrolling via F2/F3 keys
> Jump tables by "show ___"
> Jump tables when adding tasks
> Are tasks always sorted by date?
> Bug fix: problems with many commands, plus table not showing up
properly.
> The clock still isn't moving, right?