* Bug: In Hurricane, In CellViewer, pass by a temporary pixmap when
shitfing right (and bottom). We were already using the AutoCopy
buffer for the opposites moves... Seems that the drawPixmap()
may have changed of implementation.
Explanation of the diagonal lines, see QTBUG-31579 that affect
Qt 4.8.5. Temporary work around, force the pen to have a width
of 2 pixels (for _normalPen & _linePen).
* Change: In Hurricane, in CellViewer remove the redraw by whole
strip mechanism (offsetVA).
* New: In Hurricane, In CellViewer::DrawingPLanes add a tracking of
the brush offset to avoid small irregularities at the border of
two separately drawed areas.
* Bug: In Hurricane, in Graphics, display a warning about the
diagonal lines when using Qt 4.8.5.
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