Send input data in callback

[Eneroth3]

Dialog's callbacks are not meant to be very advanced; complex callbacks that reads and processes data on the JS side can be manually made by the developer using dialogs. However it would be within the scope of Dialogs to simply gather the data in input elements (if there are any) and send in the default callbacks.

If implemented, the data should be gathered similar to how HTML forms work. All inputs/textares data should be indexed by the element name. Radio button groups should function as one name-value pair (not as individual boolean inputs).