The tag adder functionality does not work if a space is entered instead of a name

Steps to reproduce:

1. Create a project
2. Go to "Edit" -> "Project Settings"
3. Select the "Tag and Layers" 
4. Expand the "Tags" section
5. Click "+"
6. Delete by default added "New tag" name
7. Observe that the "Save" button becomes disabled
8. Add a space instead of a name
9. Observe that the "Save" button becomes enabled
10. Click it

Actual results: Nothing happens, just the "Save" button blinks

Expected results: A warning should appear, which would inform that the empty tag i is not allowed. A warning should be presented in the same way as it is implemented with the duplicated tag names.

Reproducible with versions: 6000.0.53f1, 6000.1.11f1, 6000.2.0b8, 6000.3.0a1

Not reproducible with versions: -

Can’t test with versions: -

Tested on (OS): M1 Max - Sequoia 15.5