Added history dialog, cannot display all types yet

Added history support for adding objects.

Added history management for cut and paste, copy doesn't alter the object list by itself so it doesn't touch history

Added history handling for quad splitting.

Added history management for auto-bordering (and mass-addition in general)

History handling for list moving

Added history handling for set contents

Allow undo of set color

(0) -30 -10 -8 +8 +10 +30 +100 +300 +1000 tip

mercurial