Use routerLink for admin header to support middle-click navigation

Replace click event handler with routerLink directive to enable proper browser navigation behavior including middle-click to open in new tab

Author: sei-awelle

src/app/components/admin-app/admin-app.component.html

@@ -10,8 +10,8 @@
     mode="side"
     [opened]="true"
   >
-    <mat-toolbar class="sidenav-header" title="Exit Administration" (click)="goToHome()">
-      <a class="nolink" (click)="goToHome()">
+    <mat-toolbar class="sidenav-header" title="Exit Administration" [routerLink]="['/']">
+      <a class="nolink" [routerLink]="['/']">
         <div class="cssLayoutRowStartCenter">
           <mat-icon class="icon-35px player-icon-header" svgIcon="ic_crucible_player"></mat-icon>
           <h2 class="icon-text">Administration</h2>