Exclude draft.js and react-datepicker from output bundles

[sizeight]

Exclude draft.js and react-datepicker from output bundles to make the bundles lightweight.

The consuming environment will have to include the packages if they are used.

[sizeight]

Did not work. Obviously, because we still need to import these heavy libs in consumer app

[sizeight]

Wait. It can work, we can implement a second light weight component <CustomFormLight /> that does not have access to the "advanced" form input fields date, datetime and textarea-wysiwyg