Merge pull request #5492 from mfilser/master

sidebar xmark icon, add padding and background color

client/components/sidebar/sidebar.css

@@ -16,9 +16,13 @@
 }
 .sidebar-xmark {
   position: absolute;
-  right: 10px;
-  top: 5px;
+  right: 0px;
+  top: 0px;
   font-size: 25px;
+  padding: 10px;
+}
+.sidebar-xmark:hover {
+  background: rgba(0,0,0,0.15);
 }
 .sidebar .sidebar-content {
   padding: 12px;