update chat, make it render

src/app/pages/chat/group-messages/group-messages.page.html

@@ -1,6 +1,6 @@
 <ion-header class="ion-no-border">
   <ion-toolbar class="header-toolbar">
-    <div class="main-header">
+    <div class="main-header" *ngIf="ChatSystemService.getGroupRoom(roomId)">
       <div class="header-top">
         <!-- <app-btn-modal-dismiss></app-btn-modal-dismiss> -->
         <div class="left">
@@ -45,7 +45,7 @@
 </ion-header>
 
 
-<ion-content>
+<ion-content *ngIf="ChatSystemService.getGroupRoom(roomId)">
 
   <div (click)="handleClick()" class="messages overflow-y-auto" #scrollMe>
     <div class="welcome-text">
@@ -277,7 +277,7 @@
 
 </ion-content>
 
-<ion-footer>
+<ion-footer *ngIf="ChatSystemService.getGroupRoom(roomId)">
 
   <div class="typing" *ngIf="ChatSystemService.getGroupRoom(roomId).otherUserType == true">
     <ngx-letters-avatar *ngIf="showAvatar" [avatarName]="ChatSystemService.getGroupRoom(roomId).name" [width]="30"