Hide close mr button

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/sections/merge_requests.scss

@@ -91,7 +91,9 @@
 }
 
 // hide mr close link for inline diff comment form
-.diff-file .close-mr-link,
-.diff-file .reopen-mr-link {
+.merge-request {
+  .file .close-mr-link,
+  .file .reopen-mr-link {
     display: none;
+  }
 }