Improve build times

* Fix bulma/buefy being imported many (many !!!) times

* Remove javascript-time-ago because date-fns pretty much does the same
thing

* Make sure languages are loaded asynchronously

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/views/Moderation/Report.vue

@@ -443,8 +443,6 @@ export default class Report extends Vue {
 }
 </script>
 <style lang="scss" scoped>
-@import "@/variables.scss";
-
 tbody td img.image,
 .note img.image {
   display: inline;