Gaffer 1.4.15.3

Fixes

• ArrayPlug : Fixed loading of promoted plugs saved from Gaffer 1.5+.
• GraphEditor : Fixed errors when dragging an unknown file type into the GraphEditor.
• Widget : Fixed event.sourceWidget for DragDropEvents generated from a Qt native drag within the same Gaffer process. This will now reference the GafferUI.Widget that the Qt source widget belongs to, if any.
• Catalogue : Fixed bug which "stole" drags that crossed the image listing but which were destined elsewhere, for instance a drag from the HierarchyView to a PathFilter in the GraphEditor.
• GadgetWidget : Fixed signal handling bug in setViewportGadget(). This could cause the widget to attempt to redraw unnecessarily when the old viewport requested a redraw.
• RandomChoice : Fixed errors right-clicking on non-value plugs in the NodeEditor.