Fix #4149, fix #1199 - Store emojis as unicode (#4189)

- Use unicode when selecting emoji through picker
- Convert shortcodes to unicode when storing text input server-side
- Do not convert shortcodes in JS anymore

app/services/post_status_service.rb

@@ -21,6 +21,7 @@ class PostStatusService < BaseService
 
     media  = validate_media!(options[:media_ids])
     status = nil
+
     ApplicationRecord.transaction do
       status = account.statuses.create!(text: text,
                                         thread: in_reply_to,
@@ -31,6 +32,7 @@ class PostStatusService < BaseService
                                         application: options[:application])
       attach_media(status, media)
     end
+
     process_mentions_service.call(status)
     process_hashtags_service.call(status)