Update comment thread creation/removal to no longer use locationRange

Follow-up to https://gerrit-review.googlesource.com/c/gerrit/+/157590
which no longer used locationRange to group comments together into
threads. However, locationRange was still used for a few other things
including thread removal, which could result in a bug if there were
two threads that had the same locationRange and the wrong one was
found first.

Things included in this change:
1. Determine whether a thread group exists
   - This is identified as it was before. The thread group now gets a
     commentSide attribute, as it can pass it to all of its children
     (the same for all).
2. Determine if a thread exists within the group for a given range in a
   group
   - The range object is now included as an attribute on the comment
     thread instead of the locationRange string.
3. Be able to remove a thread group
   - A rootId attribute is now stored on the comment thread, which is
     data bound to each comment. When a comment is removed, it finds the
     thread with the rootId within the thread group to remove.
   - In the event that a thread group only contains a single draft,
     there is no roottId.

Change-Id: I4f7804ac02f4259b4964c6333d258f0fc3b29d24
8 files changed
tree: da1cf47113420ad706362ba5fb6a892cd08e5e97
  1. .settings/
  2. antlr3/
  3. contrib/
  4. Documentation/
  5. gerrit-gwtdebug/
  6. gerrit-gwtui/
  7. gerrit-gwtui-common/
  8. gerrit-plugin-gwtui/
  9. java/
  10. javatests/
  11. lib/
  12. plugins/
  13. polygerrit-ui/
  14. prolog/
  15. prologtests/
  16. resources/
  17. tools/
  18. webapp/
  19. .bazelproject
  20. .editorconfig
  21. .git-blame-ignore-revs
  22. .gitignore
  23. .gitmodules
  24. .mailmap
  25. .pydevproject
  26. BUILD
  27. COPYING
  28. INSTALL
  29. README.md
  30. SUBMITTING_PATCHES
  31. version.bzl
  32. WORKSPACE
README.md

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