IssueNotesRefactor: Fix padding bottom of the discussion note header.

app/assets/javascripts/notes/components/issue_discussion.vue

@@ -149,6 +149,7 @@
               :include-toggle="true"
               @toggleHandler="toggleDiscussionHandler"
               action-text="started a discussion"
+              class="discussion"
               />
             <issue-note-edited-text
               v-if="note.last_updated_by"

app/assets/stylesheets/pages/notes.scss

@@ -402,6 +402,10 @@ ul.notes {
 .note-header-info {
   min-width: 0;
   padding-bottom: 8px;
+
+  &.discussion {
+    padding-bottom: 0;
+  }
 }
 
 .system-note .note-header-info {