Add Mobile Chrome theme to default IPS4 style.

I suggest add metatag for mobile Chrome which changes toolbar color on Android 5.0 and above. This looks much better on mobile template.

I just put this:

{{if \IPS\Dispatcher::hasInstance() and \IPS\Dispatcher::i()->controllerLocation == 'admin'}}
<meta name="theme-color" content='#417ba3'>
{{else}}
<meta name="theme-color" content='{theme="main_nav"}'>
{{endif}}

And everything looks that: http://imgur.com/a/vMMVo (i censored frontpage and url). What are you think about this?