Dev: Nav bottom bar animation

src/DevTools/NavBar.scss

@@ -30,9 +30,17 @@
                     color: #fff;
                     opacity: 1;
                     background: $blue-light;
-                    border-bottom: 3px solid #fff;
                 }
             }
         }
+        .bottom-bar {
+            transition: left .3s;
+            height: 3px;
+            background: #fff;
+            position: absolute;
+            bottom: 0;
+            left: 0;
+            width: 69px;
+        }
     }
 }