Rejigger the shortcuts bar

clean up aisle 1
Part 2
Font size importance
Oooh, new arrow glyphs and nice alignment

Including subreddit compatibility additions.
Remove test code
Adjustments and browser compatibility

Tested on dozens of subreddits with Chrome and Firefox on Windows. No
known display issues presently.
A more robust if statement
Change of tactic

Found that some popular subs were being unreasonably strict and breaking
bg colors, so I'm putting my foot down. Now you can't not have a
bg-color.
Remove old if statement
Reduce width of shortcutEditButtons
Remove border
Move redrawShortcuts() to original place
Rewrite of the UI

Still works the same way, except slightly cooler looking.
Merge the two forms into one