There is a conflict between our "posttype" param for "page" component and WordPress one, that leads to the error "A post type mismatch has been detected."_ when saving an app that contains a "page" component.
We should rename our "post_type" param to solve this.
Since this WordPress commit for 4.9.9: https://github.com/WordPress/WordPress/commit/1f5919e6310e13746fadedb54bb696b86d98c373
There is a conflict between our "posttype" param for "page" component and WordPress one, that leads to the error "A post type mismatch has been detected."_ when saving an app that contains a "page" component.
We should rename our "post_type" param to solve this.