add "only platform admin can create groups" and "only groups can create events" restrictions

js/src/components/NavBar.vue

@@ -44,6 +44,7 @@
         "
       >
         <b-button
+          v-if="!hideCreateEventsButton"
           tag="router-link"
           :to="{ name: RouteName.CREATE_EVENT }"
           type="is-primary"
@@ -313,6 +314,10 @@ export default class NavBar extends Vue {
     });
     return changeIdentity(this.$apollo.provider.defaultClient, identity);
   }
+
+  get hideCreateEventsButton(): boolean {
+    return !!this.config?.restrictions?.onlyGroupsCanCreateEvents;
+  }
 }
 </script>
 <style lang="scss" scoped>