In the admin area,
Suddenly, I notice that a lot of the "Add A Listing" , or "Add an Account" buttons are no longer displaying.
The gray left and right rounded corners are showing, but the actual text.

I thought maybe somehow the phrase got removed from the language database, however
An html inspection shows that there is an element defined style of "display: none important!;"
<span class="center_add" style="display: none !important;">Add an Account</span>

how did this start happening?

and how do I undo it?

Thanks for the help / advice