Dotan Cohen schrieb:
> Kmail and Dolphin have tree views.

The tree view navigation of dolphin is already perfect. It has all the features I mentioned in my last mail. Also kmail has the
functionality to jump to the parent node by pressing LEFT (here UP and DOWN are not used for tree navigation). Oh, I've updated my
system and now system-settings is also capable of the "move to parent node" function. Very good. The only function that is still
missing is the ENTER action to open the corresponding settings in right part of the window. I've filed a feature request for that
here:
https://bugs.kde.org/show_bug.cgi?id=205830

Regards,
Stefan