hack: disable sbb header

Author: louisgreiner

src/app/app.component.html

@@ -2,6 +2,7 @@
   label="Netzgrafik-Editor"
   [subtitle]="'app.version' | translate:{ 'version': version }"
   class="sbb-header-fixed-columns noprint"
+  *ngIf="!disableBackend"
 >
   <sbb-app-chooser-section [label]="'app.user-guide' | translate" class="noprint">
     <a href="https://github.com/SchweizerischeBundesbahnen/netzgrafik-editor-frontend/blob/main/documentation/USERMANUAL.md"

src/app/netzgrafik-application/netzgrafik-application.component.scss

@@ -13,5 +13,5 @@ a.SideBarMainIcon.sbb-active {
 }
 
 .sbb-icon-sidebar-container.disableBackend {
-  top: 53px;
+  top: 0px;
 }