Bug UI bug in Unity 2018.4: can't resize panel-windows

Can't resize panels so I can't edit the settings. In Unity 2019.2 that's solved but I have another UI bug in 2019: it doesn't show me Inspector for some objects:
https://forum.unity.com/threads/critical-ui-bug-in-unity-2019-1-2f1-on-linux-mint-19-1-cinnamon.677968/ (but inspector works fine in Unity 2018.4...).
Weird things

Screen3 in the attach - this is Unity 2019.2

Linux Mint 19.1 Cinnamon