* Consistent license message for all the go files
* Fixing the last set of unconsistencies with the license headers
* Addressing PR review comments
* Fixing busy.go and busy_test.go license header
* MM-11272 Added app.PreparePostForClient
* MM-11272 Added app.PreparePostListForClient
* MM-11272 Added EmojiStore.GetMultipleByName
* MM-11272 Added emojis to PreparePostForClient
* MM-11272 Added unit tests for getting reaction counts
* MM-11272 Added unit tests for TestPreparePostForClient
* MM-11272 Added emojis from reactions to Post.Emojis
* MM-11272 Always update post.UpdateAt when reactions change to bust cache
* Fixed merge conflicts
* Moved post metadata-related code into its own file
* Update store mocks
* Fixed typo
* Add missing license headers
* Updated post metadata tests when custom emojis are disabled
* Fix unreliable unit tests
* Fix inconsistent casing in SQL statements
* Fix blank line
* Invalidate store cache after making changes
* Clear post cache synchronously with reactions