Improve error reporting when passing invalid argument types for dialog API methods

[sbekrin]

Currently next code:

dialog.showMessageBox({
    type: 'warning',
    buttons: [ 'Cancel' ],
    message: 'Foo',
    detail: {}
});

Will produce this error, which does not make much sense:

Uncaught Error: Could not call remote function ``. Check that the function signature is correct. Underlying error: Error processing argument at index 7, conversion failure from ...

This PR adds type checks and better error reporting.

[kevinsawicki]

How would feel about tweaking the error messages slightly?

Something like: Title must be a string instead of Title need to be string?

[kevinsawicki]

Thanks for improving these errors 👍 🚢