linuxmint/Cinnamon — pull request #742 by mtwebster (2012-06-11 01:01:43+00:00)
Title: Make items in center zone of a panel center-justified

This reworks the panel zone allocate code to allow items in the center zone to display as centered on the panel, rather than left-justified. This jiggers a bit with the appearance of the zones during edit mode, since to get a proper panel of left-justified --- center-justified --- right-justified zones, we need to work from right to left on our allocation, rather than left-right-center as before.

I'm not 100% sure on the RTL code, maybe someone that works in that can test it as well?