Widget UI wrapper remains when effectively empty

[abea]

To Reproduce Steps to reproduce the behavior:

• Add an apostrophe-rich-text singleton to a page, with a controls option with movable: false and removable: false. Add the singleton on the live page and hover over.

    {{ apos.singleton(data.page, 'text', 'apostrophe-rich-text', {
      controls: {
        movable: false,
        removable: false
      }
    }) }}

Expected behavior Since there are no controls, there should be no visible controls UI.

Describe the bug A small, empty controls wrapper still appears on hover. This contains a hidden clone-item button.

Server Operating System The server (which might be your dev laptop) on which Apostrophe is running. Linux? MacOS X? Windows? Is Docker involved?