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/About/AboutInstance.vue

@@ -122,8 +122,6 @@ export default class AboutInstance extends Vue {
 </script>
 
 <style lang="scss" scoped>
-@import "../../variables.scss";
-
 section {
   &:not(:first-child) {
     margin: 2rem auto;

js/src/views/About/AboutMobilizon.vue

@@ -166,8 +166,6 @@ export default class AboutMobilizon extends Vue {}
 </script>
 
 <style lang="scss" scoped>
-@import "../../variables.scss";
-
 .hero.is-primary {
   background: $background-color;
   .subtitle {

js/src/views/About/Privacy.vue

@@ -51,8 +51,6 @@ export default class Privacy extends Vue {
 }
 </script>
 <style lang="scss" scoped>
-@import "@/variables.scss";
-
 main > .container {
   background: $white;
 

js/src/views/About/Rules.vue

@@ -27,8 +27,6 @@ export default class Rules extends Vue {
 }
 </script>
 <style lang="scss" scoped>
-@import "@/variables.scss";
-
 main > .container {
   background: $white;
 }