Keybinds and rules were already reset, but now also the mousebinds are.
The default value for `xsession.windowManager.herbstluftwm.tags` is an empty list, but the config file uses `builtins.head` on it, which causes an error upon evaluation. With this change the tags configuration is skipped if the list is empty.
Also updated golden files to match new store path normalization output.
* mpd: Fix bash-version in tests * herbstluftwm: Fix bash-version in tests
