New Features
- Integrates react-virtuoso with the comments stream to render comments as a virtualized list. This will dramatically improve scrolling performance for large comment streams, especially on mobile, and removes the paginated "Load More" buttons that currently reoccur at periodic intervals
- Adds a new configuration option "Load everything", which allows administrators to choose between infinite scroll-like behavior until the end of the comments or a "Load all" button after the first 20 top-level comments for easy access to the page footer
#3880
Bug Fixes
- sanitize input in stream message input box to protect against attacks #3979