in this change:
- add "Show Fix" option to gr-comment when fixes exist
- add GET /preview and POST /apply endpoints to gr-rest-api-interface
- create gr-apply-fix-dialog that fetch preview and supports showing
multiple diffs for a single fix, apply fix button that navigate to
edit-change view, and cancel that close dialog
Screenshots: https://imgur.com/a/6xQIoz8
next:
- support switching between multiple fixes
Change-Id: I9ba5121dd3b5b51791540ac9758f98c8669b44b2
49d0a6e10d