Make prepending “re: ” to CWs on reply optional

app/javascript/flavours/glitch/reducers/compose.js

@@ -387,7 +387,7 @@ export default function compose(state = initialState, action) {
 
       if (action.status.get('spoiler_text').length > 0) {
         let spoiler_text = action.status.get('spoiler_text');
-        if (!spoiler_text.match(/^re[: ]/i)) {
+        if (action.prependCWRe && !spoiler_text.match(/^re[: ]/i)) {
           spoiler_text = 're: '.concat(spoiler_text);
         }
         map.set('spoiler', true);

app/javascript/flavours/glitch/reducers/local_settings.js

@@ -17,6 +17,7 @@ const initialState = ImmutableMap({
   confirm_missing_media_description: false,
   confirm_boost_missing_media_description: false,
   confirm_before_clearing_draft: true,
+  prepend_cw_re: true,
   preselect_on_reply: true,
   inline_preview_cards: true,
   hicolor_privacy_icons: false,