Bug fixes

#3113915 by jvi One time login for create new account and reset password are not ignored.
Configuration form UI was improved
Drupal 9 support was added

(Hopefully) the latest beta before the stable release

Declare compatibility with Drupal 9.
Do not spend time to show exact configuration difference on configuration synchronization page.
Allow to ignore keys containing colon character (#3067443).

Add responsive video feature with 100% width

Release drupal 9 compatibility.

Updated the .info file for updating the configuration file name.