Mailchimp import maximum of 10 lists

Hi,

Ran into a little problem that threw me for a few minutes when importing MailChimp lists. There is a default limit of 10 set for the /lists endpoint from MailChimp which meant that only some of the lists were imported into Perch (this client has a lot of lists!). The same is true for both the Perch 2 and 3 versions of the add-on.

I managed to get around this by temporarily editing line 23 of PerchMailChimp_Lists.class.php to be:

$lists = $MailChimpAPI->get("lists", ['count' => 30]);

A future update could add a setting to control what number of lists to import.

This is by no means high priority - I thought it may be worth reporting in case someone else encounters the same issue.

Thanks