Fix 'delete' button's tooltip after a vocabulary entry is deleted

After clicking on the delete button of a vocabulary entry, its tooltip does not go away.

How to reproduce:

• login with an admin user
• open the Administration drawer and click on Vocabularies
• select a vocabulary
• click on the delete button of any record from the list
• observe the behavior of the delete button's tooltip

Expected result: the delete button's tooltip goes away
Actual result: the delete button's tooltip does not go away

This only happens with Safari.