V8 Missing Ability to Create New "Tag"

Let me explain V7 procedure to add/rename tags, feature missing in V8.
Step 1: I double click on tag, in Italian "Etichette". A cursor appears allowing me to edit the full path.


Before editing, the tags are shown as follows:

Step 2: I add the new tag /1111 with keyboard to the existing one 0000 to obtain the full path 0000/1111

Step 3: I save modifications, and everything is updated as follows:

This is no longer possible in V8.