feat(manila): add minimum is critical feature to the UI

[VoigtS]

Summary

This is a manila UI change. Our customers desire the possibility to immediately scale their volume size if the option "Ensure this much free space" is set within the UI in order to solve sizing bottlenecks within the autoscaler. This PR implements a checkbox below this option which is only enabled if a input in the minimum size is present and attaches a attribute to the config that is then sent to the API.
The remaining differences of the file are formatting changes which occured by running the JS formatter which we use for our other projects.

Screenshots (if applicable)

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.

[andypf]

LGTM 👍