Optionally show invites in room list

Work on issue #109. Also, add a loading indicator for issue #43.

src/components/Home.vue

@@ -1,7 +1,24 @@
 <template>
-  <div>
-    <RoomList />
+  <div class="pa-4">
+    <RoomList showInvites />
     <v-btn block depressed class="outlined-button" @click.stop="logout">Logout</v-btn>
+
+    <!-- Loading indicator -->
+    <v-container
+      fluid
+      fill-height
+      style="position: absolute;background-color:rgba(0,0,0,0.2)"
+      v-if="loading"
+    >
+      <v-row align="center" justify="center">
+        <v-col class="text-center">
+          <v-progress-circular
+            indeterminate
+            color="primary"
+          ></v-progress-circular>
+        </v-col>
+      </v-row>
+    </v-container>
   </div>
 </template>
 
@@ -12,6 +29,11 @@ export default {
   components: {
     RoomList
   },
+  computed: {
+    loading() {
+      return !this.$matrix.ready;
+    }
+  },
   methods: {
     logout() {
       //TODO - For guest accounts, show warning about not being able to rejoin.