adds undo keyups
can now undo and redo the creation of notes
deletes and creates notes with undo and redo, works with server too!
refactors placement of where undo statements are made, can now undo deletions of entire trees
updates interaction of undos and redos
adds stuff for undoUpdate
implements undo using correct keys, fixes some create/delete functions and implements move and update undos which need view updater
changed 'fixme' notes at the top of action_manager
currently-- the best working condition of action manager . things are still not rendering always
removes comment