Sometimes when the Admin Dashboard positions or updates widgets, it can

result in the widget triggering a sizeChanged event, which would then

cause another layout. This resulted in a potential infinite loop, which

JavaScript would notice and abort.
The solution to this is to only cause a re-layout if the widget actually

did change size, and not just when it claimed to. This takes advantage

of the existing widget size tracking, preventing unnecessary

updateSize() calls in response to a layout change.

Verified the infinite loops I was triggering had disappeared.
Unit tests passed.