Added support for custom DateColumn timestamp formats #2366
hopefully it rebased now.
but yeah this is just something I did to solve one of my gripes with gtk3 (applications? it is hard to not put too much of the blame for anything on gtk itself at times) tending to use a bit too mixed/unprecise labels for timestamps for my liking.
Should I include a test for the standard behaviour (Say making "~#added" a date that was yesterday and comparing with "Yesterday"), or is testing for the new format enough (this standard behaviour might change after all sometime in the future, maybe)?