Remove the previewed class when pressing Escape in the .cls pane

When typing new classes in the .cls pane, they get applied to the
selected element as you type, in order to be previewed live.
However, if you press Escape, the classes go away from the .cls pane
but they stay on the element itself.
They should not.

This change fixes that by making sure we re-apply the active classes
when this happens.
It also adds a new e2e test for the .cls panel.

Gif of the fix: https://imgur.com/BjDiEQY.gif

Bug: 1114726
Change-Id: I393243b469b416b7fd001a096cda08aa10e8bce2
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2346775
Commit-Queue: Patrick Brosset <patrick.brosset@microsoft.com>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Tony Ross <tross@microsoft.com>
4 files changed
tree: 660b3431697ef79c6ea8111182429a81610728ef
  1. back_end/
  2. build_overrides/
  3. docs/
  4. front_end/
  5. node_modules/
  6. scripts/
  7. test/
  8. third_party/
  9. v8/
  10. .clang-format
  11. .editorconfig
  12. .eslintignore
  13. .eslintrc.js
  14. .gitattributes
  15. .gitignore
  16. .gn
  17. .npmignore
  18. .npmrc
  19. .style.yapf
  20. .stylelintignore
  21. .stylelintrc.json
  22. all_devtools_files.gni
  23. all_devtools_modules.gni
  24. AUTHORS
  25. BUILD.gn
  26. COMMON_OWNERS
  27. DEPS
  28. devtools_grd_files.gni
  29. devtools_image_files.gni
  30. devtools_module_entrypoints.gni
  31. ENG_REVIEW_OWNERS
  32. INFRA_OWNERS
  33. LICENSE
  34. LIGHTHOUSE_OWNERS
  35. OWNERS
  36. package-lock.json
  37. package.json
  38. PRESUBMIT.py
  39. protocol.json
  40. README.md
  41. tsconfig.base.json
  42. tsconfig.json
  43. WATCHLISTS
README.md

Chrome DevTools frontend

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The client-side of the Chrome DevTools, including all JS & CSS to run the DevTools webapp.

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