Default name for game file

[derkaczda]

Describe the feature

When a analyse a game and want to save it the current default name for the file is "Untitled" In my opinion it would be helpful to use a more concrete default name such as "YYYY.MM.DD_" or similar. If a user is not happy with he can still change it but in general this would be a more meaningful name compared to "untitled" and would increase the overall user experience.

P.S.: I only tested it on MacOS maybe it is not a problem on other platforms.