Add support for GtkCellArea
@tvb
Submitted by Tristan Van Berkom Link to original bug (#641138)
Description
This one can be tricky and time consuming: o Need support for editing GtkCellArea properties o Assigning a cell area to a layouting widget (such as icon view or treeview column). o Introspecting the "cell properties" of a cell area widget and allowing configuration of the "cell properties" in the packing editor tab as well as somewhere in the treeview editor.