Highlight nav item on hover

app/assets/stylesheets/pages/cycle_analytics.scss

@@ -215,6 +215,7 @@
       border-bottom: 1px solid transparent;
       border-right: 1px solid $border-color;
       background-color: $gray-light;
+      cursor: default;
 
       &.active {
         background-color: transparent;
@@ -228,6 +229,11 @@
         }
       }
 
+      &:hover:not(.active) {
+        background-color: $gray-lightest;
+        box-shadow: inset 2px 0 0 0 $border-color;
+      }
+
       &:first-child {
         border-top: none;
       }