IDE GUI messed up
已完成
PyCharm is unusable, see the picture. I suspect that some gui requirements disappeared or some such, but currently I have no clue how to fix it.
Screenshot is made running fresh install of 2016.3, imported settings from previous (2016.2.3), Linux Mint 18, Cinnamon.
Any help is greatly appreciated.

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Removing settings folder helped. But this is non-ideal, obviously.