Overide default URL in ZMF server properties

When entering a URL in the Ws adress in ZMF server propoties and the box is unchecked, the address disappears when we return to the Propertie.

It would have the address remains grayed

For our testing purposes we use two different URLs, if you uncheck the box the URL overide is gray, just check the box to enable overide without re-enter the URL