Duplicate Webform Submissions Issues

[jcsparks]

Seems that we're having duplicate submissions when Ajax is enabled on Webforms. This is pretty consistently happening and seems to be resolved by disabling Ajax.

Currently there's a global webform config setting to enable Ajax on all webforms. Individual webforms can not override this when it is configured this way.

Change the global webform config to disable Ajax for webforms by default. This will allow individual webforms to override and enable Ajax, so we'll have to document this to let people know not to turn this on when creating new forms.

We can do some debugging down the line to see if we can figure out why this is happening and perhaps re-enable Ajax in the future. The Webform module creator hasn't been able to replicate this particular issue with a clean Drupal install and suspects is a theme issue at the core.