Merge branch '311-loading-pb-de-mise-en-page' into 'dev'

fix(loader): double loader

See merge request !537

src/app/app.component.html

@@ -4,10 +4,11 @@
     <div *ngIf="loading" class="loader" aria-busy="true">
       <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
     </div>
-    <ng-container></ng-container>
-    <router-outlet name="left-pane"></router-outlet>
-    <router-outlet></router-outlet>
-    <router-outlet name="print"></router-outlet>
-    <router-outlet *ngIf="!loading" name="footer"></router-outlet>
+    <ng-container *ngIf="!loading">
+      <router-outlet name="left-pane"></router-outlet>
+      <router-outlet></router-outlet>
+      <router-outlet name="print"></router-outlet>
+      <router-outlet *ngIf="!loading" name="footer"></router-outlet>
+    </ng-container>
   </div>
 </div>