Sidebar should allow for some form of seperator or header.

[HAJ523]

when you add clickable buttons to the list it is not possible to arrange them in any meaningful manner as any groups you might want to create are dependent on the display text length. There should be an option to add just a header which would only contain display text and would always be the width of the full column.

Note you can mimic this today by making a long button with lots of --- or *** characters around the header but then the button needs to be clickable when really the header should not have click functionality.