1316 - Improve node completion

Changes

Show completion icon in the multi-content page menu and multi-content accordion toggle buttons.
Show a toast indicating the user's answer has been saved when they submit an activity.
Fix a bug that prevents child nodes of multi-content rows to be completed.
Fix a problem in the logic that causes progress of nodes not to be set to 1 when completed.
Change the color of the node completion icons to white and the color of the inner checkmarks to the page menu background color.

Other changes:

Show "no answers" text and a logged out alert when submitting an activity while not logged in.
Show error popup for non-backend errors (e.g. frontend Javascript errors).
Fix current row not being highlighted in the page menu.

Code refactoring:

Shorten the code for the getAnswers getter method.
Remove unused component states and methods in multiple components.
Remove the special case for node titled "Resources" when checking for multi-content completion. This feature should be TYDE-only.

Merge branch 'master' into 1316-improve-node-completion
Project: tapestry-wp	Commit: `d612a76c2a`
Status: Passed	Duration: 04:50 💡
Started: Jun 8, 2023 5:44 PM	Ended: Jun 8, 2023 5:49 PM