Matthias Kuhn 3fcabc96fe Fix action column widget rendering artifacts
This creates an action column widget when the widget is rendered for the
first time.
The original approach was to create an image and render the buffered
image onto the cell until the first mouse action triggered the creation
of the real widget. This led to several rendering problems and triggered
some strange ownership issues with crashes under certain situations.

Followup a05b2ad9
2016-06-14 11:15:15 +02:00
..
2016-06-09 11:13:11 +02:00
2016-05-14 00:21:50 +02:00
2016-04-29 14:10:26 +02:00