fixed where the scrollbar is shown in the merge request panel

app/assets/javascripts/ide/components/merge_requests/info.vue

@@ -17,8 +17,8 @@ export default {
 </script>
 
 <template>
-  <div class="ide-merge-request-info">
-    <div class="detail-page-header sticky-top bg-white">
+  <div class="ide-merge-request-info h-100 d-flex flex-column">
+    <div class="detail-page-header">
       <icon
         name="git-merge"
         class="align-self-center append-right-8"

app/assets/stylesheets/pages/repo.scss

@@ -1331,9 +1331,12 @@
 }
 
 .ide-merge-request-info {
-  overflow: auto;
-
   .detail-page-header {
     line-height: initial;
+    height: 38px;
+  }
+
+  .issuable-details {
+    overflow: auto;
   }
 }