libgui/GuiWindow.py:{onEnterWindow,__init__}(): bind wx.EVT_ENTER_WINDOW.
libroar/RoarCanvasWindow.py:applyTool(): only call tool.onMouseEvent() if mouse has moved to another cell since the last dirtying call & update lastDirtyCell.
libroar/RoarCanvasWindow.py:{onEnterWindow,onLeaveWindow,__init__}(): reset lastDirtyCell.
libroar/RoarCanvasWindow.py:__init__():
assets/text/TODO: updated.
libcanvas/Canvas.py:_dispatchDeltaPatches(): handle `resize' delta patches.
libcanvas/Canvas.py:_dispatchPatch(): only commit to journal given commitUndo.
libcanvas/Canvas.py:resize(): commit `resize' & {deleted,added} cell deltas to journal.
libcanvas/Canvas.py: minor cleanup.
libcanvas/Canvas{Backend,{Export,Import}Store,Journal}.py: minor cleanup.
assets/text/arab-puke.txt: added from mircart/pack2/.
assets/text/TODO: updated.