Fix showConfirmationModal promise functionality

[ndricimrr]

The following function is supposed to emulate the Core functionality with a Promise based structure. As in core, the developer should be able to have a callable callback function to send back the result which is then resolved.

Currently this callback is missing.

Would need to use the this.containerService.dispatch instead to add a 'callback' name too so its transferred to the passed event and send the result back to the promise.

luigi/container/src/services/webcomponents.service.ts

Lines 101 to 111 in c95b4ce

	showConfirmationModal: async settings => {
	return new Promise((resolve, reject) => {
	this.dispatchLuigiEvent(Events.SHOW_CONFIRMATION_MODAL_REQUEST, settings, data => {
	if (data) {
	resolve(data);
	} else {
	reject(new Error('No data'));
	}
	});
	});
	},