[INT] Refactored some of the plugins - 2

[eva-vashkevich]

Summary

Fixes #10774

Refactors:

• trim-whitespace
• positive-int-number
• codemirror

Occurred changes and/or fixed issues

Technical notes summary

Areas or cases that should be tested

The entire application is affected since these plugins are globally used.
In particular:

• make sure labels and icons look correct (ie spacing)
• make sure positive numbers are handled and displayed correctly
• make sure yaml editor works as expected

Areas which could experience regressions

The entire application is affected since these plugins are globally used.

Screenshot/Video

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes

[rak-phillip]

LGTM