* Fix various scrolling issues
* Move reaction scrolling to reaction list
* Handle scrolling when RHS opens
* Only run scroll update code when posts change
Remove fake img preview and collapse toggle before it is loaded,
only show img and toggle after it is fully loaded.
Fix markdown img size and add scroll down behaviour.
Id for heading markdown is unnecessary as we didn't
attach any style/effect on that id, and it also introduce
duplicate id. So remove it from heading markdown generatiing.
* Support explicit image sizes in markdown
* Cleanup code
* Add support for missing second dimension
* Overwrite height style attribute if available, use "auto" otherwise
* Fix syntax
* Do not set the height style if its value is auto
* Re-calculate width and height, if given height is bigger than max-height
* Make formulas more explicit
* 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
* PLT-1626 Stopped breaking up hyphenated hashtags when highlighting search terms
* Made hashtag search highlighting case independent
* PLT-1424 Improved search highlighting when searching for CJK characters
* PLT-1473 Added search term highlighting to single-line code blocks
* PLT-1473 Added search term highlighting to code blocks that don't use syntax highlighting
* PLT-1483 Added proper highlighting of at mentions
* Fixing formatting
* Removed MattermostLexer since it was exactly the same as the default marked one
* Updated list autonumbering to always start numbering from the first item's number
