In IE8/VML, Event handlers set on a Rect are lost after a setShape() call.

[Patrick Ruzand]

Under IE8 with the VML renderer, event handlers connected to a Rect via rect.connect() are lost after the rect shape is updated via setShape(). The following sequence illustrates the problem:

var rect = surface.createRect();

rect.connect('onmousedown', function(){...});

and later:

rect.setShape(newShape)

The problem is that under IE8, Rect.setShape replaces the shape rawNode by a new one (seems to workaround a round corner vml bug). So all connections done on the previous rawNode are lost.

[Patrick Ruzand]

testcase

[Patrick Ruzand]

duplicate of #11552