**System Information**
Operating system: Linux Mint 19 Tara
Graphics card: Nvidia GeForce GT 630
**Blender Version**
Broken:
2.80 (sub 35), branch: blender2.8, commit date: 2018-12-05 23:00, hash: c0a71b8369a
**Short description of error**
When i change the window type of a window to "User Preferences", i can't change again, because there is no exit button. The only way to get rid of the window is by dragging another window type onto it - or by closing Blender.
{F5861178}
**Exact steps for others to reproduce the error**
Switch a window to "User Preferences". Gotcha! Black hole user preferences :)