Tag form looses focus

[tbsbdr]

follow up for 9224-comma-separation

Steps to reproduce

1. checkout 9224 comma separation #9348
2. Righclick on a resource, select "Add or edit Tag"
3. Enter Hello, World or Hello [↳Enter] World[↳Enter]
4. Tag form looses focus

screenshot_001366.mp4

Expected behaviour

Tag form should keep focus focus so that a user could enter multiple tags without having to use the mouse inbetween

Actual behaviour

Tag form looses focus
Formfield needs to be focused via mouse

[JammingBen]

This has been fixed recently via #9525.