libgui/GuiWindow.py: ONCE, THERE WAS A _LETHALLY FUCKING WOUNDED_ WXPYTHON
libroar/RoarAssetsWindow.py: ON THE VERY EDGE OF ITS MISERABLE EXISTENCE
libroar/RoarCanvasWindow.py: BECAUSE A LION VICIOUSLY MAULED IT AND TORTURED IT FOR 392 DAYS AND TWO (2) SECONDS
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.