-Cleaned up some unused macros
-Imported with-gensyms from :alexandria instead of defining a fresh version
-:deal-ui now imports wigh-gensyms from :alexandria instead of from :deal
-Defined $dialog macro, haven't used it anywhere yet
-Fixed the z-index bug with dialogs (only pieces mess with their z-index now. The draggable item is always on z-index 10001)