set width: 0 when drawer mode

packages/app/src/styles/_sidebar.scss

@@ -255,7 +255,9 @@
 @mixin drawer() {
   z-index: $zindex-fixed + 2;
 
-  // override @atlaskit/navigation-next styles
+  .data-layout-container {
+    width: 0;
+  }
   div.navigation {
     max-width: 80vw;