[Glitch] Fix prepared quote not being discarded with contents when replying

Port fbe05d42fb to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

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

@@ -505,6 +505,7 @@ export const composeReducer = (state = initialState, action) => {
       map.set('caretPosition', null);
       map.set('preselectDate', new Date());
       map.set('idempotencyKey', uuid());
+      map.set('quoted_status_id', null);
 
       map.update('media_attachments', list => list.filter(media => media.get('unattached')));