Gr1N/EasyPaint — pull request #66 by faulknercs (2012-03-17 17:33:51+00:00)
Title: Done Undo/Redo Stack (issue #5)

Each ImageArea has its own QUndoStack. All stacks are controlled by QUndoGroup. UndoCommand just save whole image, it's not very effective, so when we changed instruments architecture, we shoud improve undo command's.