Fix bot.dom.isEditable with more input element types

Some input element types that are considered editable by W3C WebDriver
Recommendation were not allowed by bot.dom.isEditable. Those missing
types are now added. See https://www.w3.org/TR/webdriver1/#dfn-editable.

javascript/atoms/dom.js

@@ -348,7 +348,13 @@ bot.dom.isContentEditable = function(element) {
 bot.dom.isEditable = function(element) {
   return (bot.dom.isTextual(element) ||
           bot.dom.isFileInput(element) ||
-          bot.dom.isInputType(element, 'range')) &&
+          bot.dom.isInputType(element, 'range') ||
+          bot.dom.isInputType(element, 'date') ||
+          bot.dom.isInputType(element, 'month') ||
+          bot.dom.isInputType(element, 'week') ||
+          bot.dom.isInputType(element, 'time') ||
+          bot.dom.isInputType(element, 'datetime-local') ||
+          bot.dom.isInputType(element, 'color')) &&
       !bot.dom.getProperty(element, 'readOnly');
 };