Reduce transition duration for <Tab>'s

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/renderer/components/tabs/tabs.scss

@@ -72,7 +72,7 @@
       bottom: 0;
       width: 0;
       height: $unit /2;
-      transition: width 250ms;
+      transition: width 150ms;
       background: currentColor;
       color: $halfGray
     }