A more direct approach to create new tags

Is your feature request related to a problem? Please describe.

The problem is that creating new tag is not friendly. At the beginning, it takes some time to figure out how to create new tags. There are issues for creating new tag: 1. when I upload an abbreviation (e.g., GU which means Genitourinary), the abbreviation is not in the dropdown menu. I need to press Escape button to exit dropdown menu having searching results and press enter to create new tags. If I didn't do that, it will just select the default item in the dropdown menu. 2. If the tag is very short and not in the db just like GU, it will generate a long list of searching results containing "gu". I need to take some time to view the whole list to verify if there is the tag.

Describe the solution you'd like

1. there will be a button for me, when I need to create a new tag.
2. Searching query can help me to identify if the tag is in the system or not.

Describe alternatives you've considered
If I can know if the tag is in the system from the searching results, I can create it with current design. It's just taking some time to figure out at the beginning. After that, there is no problem.

Additional context