Group Queue Exact, Apply Selected, and Clear Selected into a single
'Link' dropdown menu in the missing browser footer. Move Auto-Link 100%
into the same menu and show/hide it when exact local matches exist.
Add disabledWhen support to createFooterMenu items so buttons can be
visually and functionally disabled. Include disabled state styles for
.mr-footer-menu-item.
Simplify footer visibility logic and update references throughout.