* MM-16442: leverage post hasReactions utils function
This handles backwards compatibility with servers that do not have post
metadata, allowing the client to detect the presence of reactions that
in turn might need to be loaded when the component is mounted.
* temporary mattermost-redux commit for testing
* revert usage of hasReactions, and count directly
We still fallback to has_reactions if set, in case we're connected to a server without post metadata.
* revert mattermost-redux changes
* Update setNavigatorStyles
* Replace navigator.setOnNavigatorEvent and callbacks
* Update unit tests
* Save user notify props on componentWillUnmount
* Add TODOs about removing componentDidAppear/setNavigatorStyles
* check-styles fix
* Fix eslint errors
* MM-10273 Add hashtag support
* Put hashtag search in a proper modal
* Change hashtag search style to match regular search
* Move Hashtag component and explicitly pass props
* Add unit tests for Hashtag component
* Fix merge conflict
* Long post support
* Fix upload preview
* Add MaxPostSize validation
* Fix show more button container
* localization
* feedback review
* UI feedback review
* Upgrade mattermost-redux
* Fix long post attachment list
