Fix position of titles for related changes

Regressed by Change 318682 because h4 became h3 and rules for h4
don't apply to h3.

Google-Bug-Id: b/203182154

Change-Id: I36432585158af26525739beaaa0143c60639c1e3
(cherry picked from commit e34749c1de49e3756e8e4ed950b9849c35bb91db)
diff --git a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts
index bce4024..7493e2f 100644
--- a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts
+++ b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.ts
@@ -691,18 +691,13 @@
       css`
         .title {
           color: var(--deemphasized-text-color);
-          padding-left: var(--metadata-horizontal-padding);
-        }
-        h4 {
           display: flex;
           align-self: flex-end;
+          margin-left: 20px;
         }
         gr-button {
           display: flex;
         }
-        h4 {
-          margin-left: 20px;
-        }
         gr-button iron-icon {
           color: inherit;
           --iron-icon-height: 18px;