removed home server name from roomName in join page

src/components/Join.vue

@@ -13,7 +13,7 @@
             {{ $t("join.title") }}
           </div>
           <div class="join-title">
-            {{ roomName }}
+            {{ roomName | removeHomeServer }}
           </div>
         </div>
 
@@ -214,6 +214,11 @@ export default {
       return activeLanguages.filter(lang => lang.value === this.$i18n.locale);
     }
   },
+  filters: {
+    removeHomeServer(roomName) {
+      return roomName ? roomName.substring(roomName.indexOf("#") + 1, roomName.lastIndexOf(":")) : '';
+    }
+  },
   watch: {
     roomId: {
       immediate: true,