[elements] Update working copy from Styles tab.

When modifying CSS, the Styles tab previously wrote straight to disk
when a workspace folder was connected, instead of updating the working
copy (like the Sources panel does). This is a very inconsistent and
confusing behavior, and doesn't align with the intended use cases that
we're working on for Workspace feature.

Also show an asterisk in the Styles tab for modified CSS files, similar
to what we do in the Sources panel.

Bug: 405312529
Screenshot: https://i.imgur.com/iXDyU1S.png
Change-Id: I980cb87a8d985f4cab6b6b26fa2618ee6001d24c
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6382153
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ergün Erdoğmuş <ergunsh@chromium.org>
Commit-Queue: Ergün Erdoğmuş <ergunsh@chromium.org>
3 files changed
tree: 25223dfd4e179127d34e89b8aca281f9d16bd40a
  1. .vscode/
  2. build_overrides/
  3. config/
  4. docs/
  5. extension-api/
  6. extensions/
  7. front_end/
  8. inspector_overlay/
  9. node_modules/
  10. scripts/
  11. test/
  12. third_party/
  13. v8/
  14. .clang-format
  15. .editorconfig
  16. .git-blame-ignore-revs
  17. .gitallowed
  18. .gitattributes
  19. .gitignore
  20. .gitmodules
  21. .gn
  22. .mailmap
  23. .npmignore
  24. .npmrc
  25. .style.yapf
  26. .stylelintignore
  27. .stylelintrc.json
  28. AUTHORS
  29. BUILD.gn
  30. codereview.settings
  31. CONTRIBUTING.md
  32. DEPS
  33. eslint.config.mjs
  34. favicon.ico
  35. LICENSE
  36. OWNERS
  37. package-lock.json
  38. package.json
  39. PRESUBMIT.py
  40. README.md
  41. tsconfig.json
  42. WATCHLISTS
README.md

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