Disabled tabs still acessible trough direct link
if you open in new tab it redirects to working tabs, but if you open deactivated tab in same tab it opens
you have to reload the page for the client to pick up the changes after a deploy - as disabling it removes it from the dom - you have to reload the page. Hiding it does just hide it from the menu but leaves it in the dom - so yes for hidden pages you can still manually navigate there.
i did reload it, for example tab 0 is enabled and 1 is disabled, i input .../ui/#!/1 in new browser tab, it opens .../ui/#!/0, but if in same tab i input .../ui/#!/1 again it opens .../ui/#!/1