Description
tabindex controls the focus order. We should never change the focus order that the browser sets, and only make use of tabindex=-1 or tabindex=0 (or no tabindex at all) to determine if the element should or should not be focusable.

Step To Reproduce
Steps to reproduce the behavior:

1. Go to Font Manager

Expected behavior
To be able to tab through all the elements correctly without having to have a manual tab index.

Screenshots