Remove top margin for issue/mr title

app/assets/stylesheets/generic/typography.scss

@@ -17,6 +17,10 @@ h3.page-title {
   font-size: 22px;
 }
+h4.page-title {
+  margin-top: 0px;
+}
+
 h6 {
   color: #888;
   text-transform: uppercase;