Panels methods onResize and onCollapse are not triggered when setLayout is called

[Sloebel]

Hi,

On screen that I develop, I'm using the collapse feature, once I'm forcing a layout on the PanelGroup with the setLayout method, onResize or onCollapse methods on Panel are not triggered

4 Panels example:
while being in sizes state of [10, 20, 70, 0], I'm calling setLayout([10, 0, 45, 45])
the second Panel is not ware that he is in collapse state and the 4th Panel isn't aware that he is out from collapse state

any suggestions?

Thanx in advance

[bvaughn]

Seems related to #123.

Not a high priority for me but I'd be willing to review a PR.

[bvaughn]

I'll release this fix with 0.0.51 this morning.