Bad validation for 'WSDL file' field - wsdl2rest wizard

• There is a bad validation if user wants to specify URL of WSDL file by typing it into field manually.

1. If path is changed to invalid --> Error Log view reported that path is incorrect, but wizard button 'Next' is still allowd and path field is marked as valid. After click on 'Finish' button there is pop-uped failure.
2. If user goes back and repaired path to valid place again by typing to the filed --> path field is still invalid

Only way to avoid this problems is by using wizard buttons (...) --> selection dialog.