The loadImageFromURL type definition is misleading

[marlo22]

Describe the bug
The loadImageFromURL method's type suggests that the second parameter (imageName) is optional, but it's required.

To Reproduce
Just use the method and look that TS doesn't complain when we don't pass imageName. If you run the application, it logs an error.

Here, we can see that the function rejects a Promise if imageName is falsy.

tui.image-editor/apps/image-editor/src/js/imageEditor.js

Lines 751 to 754 in 9ee993e

	loadImageFromURL(url, imageName) {
	if (!imageName || !url) {
	return Promise.reject(rejectMessages.invalidParameters);
	}

Expected behavior
The imageName parameter in the loadImageFromURL definition is marked as required.