Improve workflow of creating new messages group

+ add new customised buttons

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

@@ -9,7 +9,7 @@
           <ion-icon  (click)="openOptions()" src="assets/images/icons-menu.svg"></ion-icon>
         </div>  
       </div>
-      <div (click)="addContacts()" class="header-bottom">
+      <div (click)="openGroupContactsPage()" class="header-bottom">
         <div class="header-bottom-icon">
           <ion-icon src="assets/icon/icons-user.svg"></ion-icon>
         </div>