GUI Tweaks

I made some minor tweaks. Popup boxes now show up to the left instead of
to the right. Variables is two rows thick on the right with methods
below it. Trash buttons aren't visible because they aren't being used.
Buttons below Editor are different colors and have different content.
Border thickness is lessened. Editor panel is now matching grey with
everything else instead of black. Heights and widths of the palettes are
changed to get rid of excess white space.