* Added highlighting to links when their URL includes the search term
* Decoupling UserStore from react-router to allow for unit tests involving it
* PLT-3998 Added SiteURL as an option to be passed into the text formatting code
* Removed reference to PreferenceStore and window from TextFormatting
* Refactored TextFormatting to remove remaining browser-only code
* Updated ChannelHeader and MessageWrapper to match the changes to TextFormatting
* Increased max listeners for Preference and Emoji stores
* PLT-3832 Added automated unit tests for autolinking
* PLT-3567 Rerender posts when mention keywords change
* Updated RHS and search to match the changes to TextFormatting
* Broke TextFormatting's dependency on the UserStore
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