Save button is highlighted as if user can press "Save". "Save" button should only be highlighted when user has given the File name.

Steps to Reproduce:
1.Open Unity Editor
2. File->Click on New Project
3.Click on Create on New project window
4.Click on Save scene from file
5.Save screen opens up with Save button is enabled/highlighted

Expected: 'Save' button should be either disabled/not highlighted when the text is empty in file name. "Save" button should only be highlighted when user has given the File name.

Actual: Save button is highlighted as if user can press "Save".