Torque 3D Beta 5 Bug - Popup calls deleted object parent fn [+fix]

I think I found something interesting:

guiPopUpCtrl.cpp:

void GuiPopupTextListCtrl::onMouseUp(const GuiEvent &event)
{
   Parent::onMouseDown(event);
   mPopUpCtrl->closePopUp();
   Parent::onMouseUp(event);
}

closePopUp() will destroy the text list control that belongs to the popup. When it returns (and it does return), it calls Parent::onMouseUp(event) which would break guiControl's virtual onMouseUp with an uninitialized this if there was anything using the current object in there.

I think our best bet is getting rid of that Parent::onMouseUp(event); all together.
(I know GuiControl::onMouseUp is virtual for a reason, just saying. :)