imap folder name: "Junk" vs "junk"

I have experienced a weird property of the junk folder name. Everywhere in Thunderbird (in the Help or Settings. Even in the default Folder bar at the left) is used "Junk", with a capitalized "J". But if I have such imap folder Thunderbird did not recognized is as such, only the "junk" with a lowercase "j" do the magic and the flame icon aside it. 
I understand that a billion peoples already use it and are happy with the actual settings, so introduce the new (even correct) behavior could break the things. But ...
Could you please make possible to set the name of the special folder Junk/junk ? 

Loriel

Hi, I have experienced a weird property of the junk folder name. Everywhere in Thunderbird (in the Help or Settings. Even in the default Folder bar at the left) is used "Junk", with a capitalized "J". But if I have such imap folder Thunderbird did not recognized is as such, only the "junk" with a lowercase "j" do the magic and the flame icon aside it. I understand that a billion peoples already use it and are happy with the actual settings, so introduce the new (even correct) behavior could break the things. But ... Could you please make possible to set the name of the special folder Junk/junk ? Thank you in advance for the help or link to the some documentation that solves this issue. Regards Loriel