Update ja.json

[taikun114]

I have updated Japanese translations again.

[zhbjsh]

I removed the colons (":") before {details}, as the details are inside brackets and sometimes there will be no details. Can you check if this is ok?

[taikun114]

I see, thank you.
I couldn't find what text might appear in {details}, could you please tell me what might appear?

[zhbjsh]

Those will be explanations of the error messages that can't be translated unfortunately, before you had to check the logfile to see them. For example it will say: SSH connection failed (Unable to connect to port 22)

[taikun114]

Oh, I see. I think there is no problem if it appears that way. Thank you!