[web] fix alignment issue for "back to editor" button (#18218)

GitOrigin-RevId: 2a5df7019188f305d475065ab00b6f33722e60d7

services/web/frontend/stylesheets/app/editor/toolbar.less

@@ -29,7 +29,7 @@
   }
 
   .toolbar-right .back-to-editor-btn {
-    margin-right: 25px;
+    margin-right: 27px;
     display: flex;
     align-items: center;