[TIMOB-8299] iOS: Highlight or select text inside of Ti.UI.TextArea / Ti.UI.TextField

This is what the customer is trying to do: 'I want to highlight the text in it once user tap in it so then on typing next character, previous text (highlighted on tap) goes away and newly entered data replaces it.' Currently this is not possible to do using Titanium, however it's possible to do in native code, like it has been done here: http://stackoverflow.com/questions/6158854/auto-selection-of-text-in-textfield-on-tap -HD ticket: http://support-admin.appcelerator.com/display/APP-844716