Run button feedback when program doesn't compile

[uncomputable]

There should be a "rejection" animation when the run button is clicked on a non-compiling program. Something like a red flash with the button wiggling from left to right.

Right now, when the parse errors are outside of the screen, there is no feedback at all.

[dpet]

For now I can disable the button and add disabled styling when there are parsing errors.

[uncomputable]

Fixed in #37