DEV: Use appEvents instead of jQuery for composer resizing progress (PR #12574)

This event was needed for plugin work, and I’d rather not add new jQuery dependencies. Not sure which plugins currently use this event?

GitHub

I don’t see any code using this event, in core nor all-the-plugins/all-the-themes. The only other occurrence is in discourse-quick-messages because it copies the code from core. I think we can remove it completely?

(I’d label this as DEV rather than FEATURE since it’s not a feature or a user-facing breaking change)

The title of this pull request changed from “FEATURE: Use appEvents instead of jQuery for composer resizing progress” to "DEV: Use appEvents instead of jQuery for composer resizing progress

This is for a new plugin we’re working on @CvX - I renamed to DEV.