Save button should be enabled with less input

[t-b]

Windows beta14, Same on linux with latest master.

Recipe:

• Open Qt-SESAM
• Enter master password
• Enter domain name

Now I would except that I can already save the settings. But the "Save" button is still disabled. Only when I enter info in URL or user it is enabled.

The example text in URL/user name also says "Can be empty" ("Kann leer bleiben" in german).