GridViewEditor: Missing redraw when set_cell() with dirty cells

[nheir]

Steps to reproduce:

• Run the demo_GridViewWidget notebook
• goto the second example of "Interactive edition of Young tableaux"
• Replace 10 (or any value) by 9 (a wrong value)
• Reverse the change

Result:

• The modified cell stay dirty

Expected:

• All cells are clean

This might get more complex with more dirty cells.
It also don't change the set of visible addable/removable cells leading to potential exceptions.

See:

sage-combinat-widgets/sage_combinat_widgets/grid_view_editor.py

Lines 610 to 613 in dcd47e4

	# Success
	self.donottrack = True
	self.set_value(result)
	self.donottrack = False

sage-combinat-widgets/sage_combinat_widgets/grid_view_editor.py

Lines 405 to 414 in dcd47e4

	self.reset_dirty()
	if self.donottrack:
	return
	old_val = change.old
	new_val = change.new
	actually_changed = (id(new_val) != id(old_val))
	if actually_changed:
	self.push_history(old_val)
	self.compute()
	self.draw()