Beaver Builder Integration#128

The plugin works with Beaver Builder, but I’d love to see tighter integration.

1) In the same way integration with Oxygen and Bricks has been added.
2) In detecting the correct classes. Whenever I give a custom class to a module or row, when I go to select it in Motion.page it can’t find it and just finds the default classes, this means I have to type or paste the classes in manually which isn’t as great of a user experience.