Install CustomShortcuts for Editor Up and Down in every trees widgets

After remaping up/down keys it allows me to use new shortcuts in every ListScrollingUtil bases list widgets but not in any tree widgets.

For tree widgets there is coresponding TreeUtil class with installActions but without handling custom shortcuts.

This pull merge fixes this and adds "Editor Up" and "Editor Down" shortcuts tu use in any tree based widget.

It allows for vim biased users to use Project Structure, File Structure, Find Results without forcing them to use arrow keys.