Ultimate Member - MailChimp 2.4.7

* Fixed: PHP warnings

* Added: Remove MailChimp settings, connections, form fields on uninstall
* Added: Remove user role settings related to MailChimp on uninstall
* Added: Remove user meta related to MailChimp on uninstall
* Added: Remove custom templates related to MailChimp on uninstall
* Added: Default value for the "Groups and Tags view" setting
* Added: Auto-fill MailChimp groups and tags in the registration form after failed submit
* Fixed: A contact update if the user email is changed
* Fixed: Deleting fields on post delete or trash if field type is empty
* Fixed: Error in Admin dashboard if MailChimp API key is incorrect
* Fixed: Group's interests removing in account notifications tab

* Added: Hook um_mailchimp_can_sync
* Added: Display a list of newsletters after the member name (for administrators)
* Added: Sanitize connection title on connection update
* Added: Remove fields which use deleted connection on connection delete
* Fixed: Connection roles setting
* Fixed: Double opt-in feature
* Fixed: Error on activation without a core plugin
* Fixed: Don't display field label if empty
* Improved: Internal caching
* Improved: Planned requests are used instead of immediately requests
* Improved: Widget "Testing connection with MailChimp server"