[Feature request] Tags type: selected tag should fill the field

**Is your feature request related to a problem? Please describe.** If I want to use existing nested tags as a base for a new one, I can not select it to complete it. **Describe the solution you'd like** Allow to use `tab` key to replace the field content (2) with the selected tag (1) so we can then build a new tag from an existing one. <img width="748" alt="screen" src="https://github.com/user-attachments/assets/4a60d704-1fbd-494a-be34-e88665fde5c7" />