[Glitch] Fix status mismatch of sensitive check

Port 691b827c87 to glitch-soc

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

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

@@ -578,6 +578,10 @@ export default function compose(state = initialState, action) {
       if (action.status.get('spoiler_text').length > 0) {
         map.set('spoiler', true);
         map.set('spoiler_text', action.status.get('spoiler_text'));
+
+        if (map.get('media_attachments').size >= 1) {
+          map.set('sensitive', true);
+        }
       } else {
         map.set('spoiler', false);
         map.set('spoiler_text', '');