On the API server configuration, add readable values on the range widget

Problem/Motivation

On the /admin/config/content/g2/api page, the Coefficient limit for API operations over block settings range widget does not visually represent the limits and, more importantly (because the limits are in the description), the current value of the coefficient.

Steps to reproduce

Navigate to /admin/config/content/g2/api page, open the API Server details. Observe and manipulate the range element. Notice how no number appears.

Proposed resolution

- Add some jQuery and CSS code to a g2-admin library to support this
- Created ✨ Improve the FormAPI range element UX Active .

Remaining tasks

• If it doesn't, build a solution

User interface changes

Three numbers displayed around range widgets, controlled by new properties on the Range element, possibly:

• showMin
• showMax
• showCurrent

API changes

None.

Data model changes

None.