UX: Prevent timeline overlapping topic footer buttons

UX: Prevent timeline overlapping topic footer buttons

diff --git a/app/assets/stylesheets/common/topic-timeline.scss b/app/assets/stylesheets/common/topic-timeline.scss
index e1e54b6..2d13a8a 100644
--- a/app/assets/stylesheets/common/topic-timeline.scss
+++ b/app/assets/stylesheets/common/topic-timeline.scss
@@ -26,6 +26,7 @@
       opacity: 0;
       pointer-events: none;
       cursor: default;
+      height: 0px;
     }
   }
 

GitHub sha: d653d2f5