[PLAT-1079] Fix/vanish cookie

[TrevorBurgoyne]

Fix/vanish

Description

Fix inconsistencies relating to the vanish button:

• Fix bug where the Vanish button wouldn't update its locked state when switching between subtasks.
• Fix bug where clicking the Vanish button would unexpectedly set the size cookie, causing future annotations in the same subtask to be loaded in a very small size on subsequent sessions, with the only way to recover being to increase the annotation size.
  • To replicate in previous version: Load the ULabel demo resume_from.html, and click the vanish button. Then refresh the page, and the annotations will remain vanished but the vanish button is not locked. Toggling the vanish button does nothing, to recover annotations, increase the annotation size.

PLAT-1079

PR Checklist

• Merged latest main
• Version number in package.json has been bumped since last release
• Version numbers match between package package.json and src/version.js
• Ran npm install and npm run build AFTER bumping the version number
• Updated documentation if necessary (currently just in api_spec.md)
• Added changes to changelog.md

Breaking API Changes

Subtasks that are vanished or set to the smallest possible size no longer have that size saved in the annotation size cookie.

[joshua-dean]

Seems to fix it 👍