Instead of using spoiler boolean and spoiler_text, simply check for non-blank spoiler_text

Federate spoiler_text using warning attribute on <content /> instead of a <category term="spoiler" />
Clean up schema file from accidental development migrations

config/locales/en.yml

@@ -93,6 +93,8 @@ en:
     back: Back to Mastodon
     edit_profile: Edit profile
     preferences: Preferences
+  statuses:
+    over_character_limit: character limit of %{max} exceeded
   stream_entries:
     click_to_show: Click to show
     favourited: favourited a post by