fix white bar under cards (FINALLY!)
added constructor and removed useless imports
styled checkbox on BuilderCards
removed "autosave" functionality (too complex, and i'm afraid it's going to cause a lot of bugs) as well as a bunch of other small cleanup/changes.
removed unneeded things
standardized test file names
removed cruft
cleaned up the styling of DeckSorter and made element removal look nicer
fixed test