Fix slim sidebar animation on xxxl screens

src-ui/src/app/components/app-frame/app-frame.component.scss

@@ -18,7 +18,7 @@
     height: 0.8em;
   }
 
-  // These come from the col-md-3 col-lg-2 classes for regular sidebar, needed for animation
+  // These come from the col-* classes for non-slim sidebar, needed for animation
   @media (min-width: 768px) {
     max-width: 25%;
   }
@@ -27,6 +27,10 @@
     max-width: 16.66666667%;
   }
 
+  @media (min-width: 2000px) {
+    max-width: 8.33333333%;
+  }
+
   transition: all .2s ease;
 }
 @media (max-width: 767.98px) {