fix(locators): by.cssContainingText now operates on pre-transformed text

Previously, the implementation depended on the browser. Now, it will always
operate on the text before text-transform is applied. Closes #1217

lib/clientsidescripts.js

@@ -489,7 +489,7 @@ functions.findByCssContainingText = function(cssSelector, searchText, using) {
   var matches = [];
   for (var i = 0; i < elements.length; ++i) {
     var element = elements[i];
-    var elementText = element.innerText || element.textContent;
+    var elementText = element.textContent || element.innerText;
     if (elementText.indexOf(searchText) > -1) {
       matches.push(element);
     }