Make clear that the eu_cookie_compliance_eu_countries array is optional

Looking at 7.x-1.16 on a test site, I see the new option to restrict the popup to certain countries - either by source PHP, or at a javascript level. Nice. Particularly the latter, which avoids paying a price on caching.

When I hover over those two checkboxes, the following explanation is displayed:

If you want to limit the number of countries for which the cookie is displayed, you can place an array in $conf[\'eu_cookie_compliance_eu_countries\'] in your settings.php. Using the geoip module or the smart_ip module or the geoip_country_code_by_name() PHP function.

I took that to mean that I had to create such an entry in my settings.php file. So I started to do so, only to realise I didn't know exactly what format it needed to have (2 character ISO country codes, 3 character, or ...).

So I searched the code to see how it uses the array ... to find that there is a sensible default that sets the array to all EU countries, or "null".

So may I request that this admin screen tooltip is altered to make clear that:

You can limit the number of countries for which the warning is displayed by checking this option. If you want a list of countries other than current EU states, you may place an array in $conf[\'eu_cookie_compliance_eu_countries\'] in your settings.php.

(I also changed "cookie" to "warning" - it's not strictly the cookie that is displayed in the popup)