Improve the public hashtag page (#9831)

- Fix height not updating when clicking show more on public hashtag page
- Add header to the public hashtag page
- Change text size and margins on the public hashtag page

app/javascript/styles/mastodon/widgets.scss

@@ -450,5 +450,33 @@ $fluid-breakpoint: $maximum-width + 20px;
     @media screen and (max-width: $no-gap-breakpoint) {
       border-bottom: 1px solid lighten($ui-base-color, 12%);
     }
+
+    &.compact {
+      .detailed-status__meta {
+        margin-top: 15px;
+      }
+
+      .status__content {
+        font-size: 15px;
+        line-height: 20px;
+
+        .emojione {
+          width: 20px;
+          height: 20px;
+          margin: -3px 0 0;
+        }
+
+        .status__content__spoiler-link {
+          line-height: 20px;
+          margin: 0;
+        }
+      }
+
+      .media-gallery,
+      .status-card,
+      .video-player {
+        margin-top: 15px;
+      }
+    }
   }
 }