NXP-11682: use the chainId or operationId action properties
NXP-11063: better computation of the overlay width and height
NXP-11063: format and cleanup 'nxdropzone.js'. Make it possible to contribute another 'handler' instead of the default one DropZoneUIHandler
NXP-11063: always resize the overlay after an upload is started
NXP-11063: update the 'uploadIdx' after calling the uploadStarted callback
Post release 5.7.1
NXP-11704: remove ugly workaround