fix(package): show displaYNameInitials only if user photoURL is not available

Author: Dehfw

src/module/components/ngx-auth-firebaseui-avatar/ngx-auth-firebaseui-avatar.component.html

@@ -5,15 +5,15 @@
         [style.background-image]="'url(' + user?.photoURL + ')'"
         style="background-size: cover"
         [matTooltip]="user?.displayName">
-  {{displayNameInitials}}
+  <span *ngIf="user?.photoURL">{{displayNameInitials}}</span>
 </button>
 
 <mat-menu xPosition="before" #posXMenu="matMenu" class="before">
   <div fxLayout="row" fxLayout.xs="column" style="padding-left: 10px; padding-right: 10px">
     <button mat-fab
             [style.background-image]="'url(' + user?.photoURL + ')'"
             style="background-size: cover">
-      {{displayNameInitials}}
+      <span *ngIf="user?.photoURL">{{{displayNameInitials}}</span>
     </button>
     <div fxLayout="column" style="padding-left: 10px; padding-right: 10px">
       <strong mat-card-title>{{user?.displayName}}</strong>