## Description
1. Allow scrub on any css value that can be numeric, no matter what
current keyword value might be selected
2. Adjust scrub speed depending on the unit
## Steps for reproduction
1. try scrubing any css value
3. backdrop fill in the effects section won't allow to scrub , which is
correct
4. try changing dfferent units and see how it feels, if the speed is
appropriate
## Code Review
- [ ] hi @istarkov , I need you to do
- conceptual review (architecture, feature-correctness)
- detailed review (read every line)
- test it on preview
## Before requesting a review
- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")
## Before merging
- [ ] tested locally and on preview environment (preview dev login:
5de6)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env.example`
and the `builder/env-check.js` if mandatory
