fix FormInput padding for select

Author: srph

stylesheets/base/_form.scss

@@ -1,6 +1,6 @@
 .FormInput {
   display: block;
-  padding: ($formSize-base / 3) ($formSize-base / 5);
+  padding: ($formSize-base / 5);
   width: 100%;
   height: $formSize-base;
   background: $color-white;