Add aria-controls to extra-buttons trigger

src/components/poll/poll.js

@@ -1,4 +1,5 @@
 import Timeago from 'components/timeago/timeago.vue'
+import genRandomSeed from '../../services/random_seed/random_seed.service.js'
 import RichContent from 'components/rich_content/rich_content.jsx'
 import { forEach, map } from 'lodash'
 
@@ -13,7 +14,7 @@ export default {
     return {
       loading: false,
       choices: [],
-      randomSeed: `${Math.random()}`.replace('.', '-')
+      randomSeed: genRandomSeed()
     }
   },
   created () {