BUG: re-render CSS with `styler.apply` and `applymap` non-cleared ` _todo`
- [ x] closes #39395
- [ x] tests added / passed
- [ x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [x] whatsnew entry

@jreback, changes added, is green. thanks @attack68 