Canvas: Overlapping comments

Overlapping comments

To further support content collaboration, Canvas now supports overlapping comments in documents and notes. You no longer need to strategically place comments in a way that doesn't overlap with existing comments.

🐛 Notable bugfixes

Fixes an issue where an HTML table wouldn't get pasted if it only contained table headings.

Added mitigations for "flash of old content" that could sometimes occur when connection was re-established while editing