fix excessive underline in sidebar

src/App.scss

@@ -809,6 +809,7 @@ nav {
 
 .button-icon {
   font-size: 1.2em;
+  margin-right: 0.5em;
 }
 
 @keyframes shakeError {

src/components/timeline_menu/timeline_menu.vue

@@ -64,7 +64,7 @@
   .timeline-menu-popover-wrap {
     overflow: hidden;
     // Match panel heading padding to line up menu with bottom of heading
-    margin-top: 0.6rem;
+    margin-top: 0.6rem 0.65em;
     padding: 0 15px 15px 15px;
   }
   .timeline-menu-popover {
@@ -138,10 +138,6 @@
     &:last-child {
       border: none;
     }
-
-    i {
-      margin: 0 0.5em;
-    }
   }
 
   a {