Normalize form element text-transform

By default, browsers set `text-transform:none` on most form controls in
order to prevent `text-transform` being inherited from ancestor nodes.

However, the `button` and `select` elements are exceptions.

* Firefox and Opera do not apply `text-transform:none` to `select`.

* Chrome, Safari, and IE 8+ do not apply `text-transform:none` to
  `button.

It's not suitable to set `text-transform:inherit` because all other form
elements intentionally avoid it. Safari will not honour that style for
`select`, and Chrome will only do so when the `select` element is
clicked.

Further details:
http://tjvantoll.com/2012/07/10/default-browser-handling-of-the-css-text-transform-property/

normalize.css

@@ -291,6 +291,18 @@ input {
     line-height: normal;
 }
 
+/**
+ * Address inconsistent `text-transform` inheritance for `button` and `select`.
+ * All other form control elements do not inherit `text-transform` values.
+ * Correct `button` style inheritance in Chrome, Safari 5+, and IE 8+.
+ * Correct `select` style inheritance in Firefox 4+ and Opera.
+ */
+
+button,
+select {
+    text-transform: none;
+}
+
 /**
  * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
  *    and `video` controls.