* Revert "Revert "Add (updated) mention autocomplete to post comments (#13061)" (#13116)"
This reverts commit e28bde043c.
* Fix issues with editing comments and arrow key navigation, update tests
* Update app/javascript/crayons/MentionAutocompleteTextArea/MentionAutocompleteTextArea.jsx
Co-authored-by: Nick Taylor <nick@forem.com>
* refactor adding of attributes
* destructure
Co-authored-by: Nick Taylor <nick@forem.com>
* add mention autocomplete functionality to article and notification comments
* add cypress tests
* make sure entry transitions dont replay
* undo change to async useeffect covered in other pr
* move search into dynamic import
* exit search if enter pressed in middle of search term
* refactor button activation code
* add a space after a mention is selected
* tweak cypress test for reply to ensure it awaits combobox
* small refactor
* initial setup of component
* initial styles applied
* add some initial docs
* small tweaks to story
* add some very initial tests
* tweaks to styles to add border bottom
* add some preact tests
* import default style in jsx, ignore in jest
* WIP - create MentionAutocompleteListener, attempt to position popover
* position dropdown correctly, exit selection in various scenarios
* refactor
* make sure cursor placed correctly after selection
* only import autocomplete when needed
* rename files, add jsdoc
* update tests and story notes
* tidy up scss file
* fix story styling
* fix aria label in story
* fix issue with key event not triggering in mobile
* position dropdown at input left if small screen
* fix issue with deleting and re-entering
* don't trigger search if directly following a letter or number
* stop change event being fired with highihted text
* move regex out of function into constant
