Just open the display, and in the top-left coprner where you see the display name you can change the name that is shown there.
I agree that that is quite an odd place and integrating that into the display meta-data settings panel shown in your screenshot would make more sense.
Seems to work fine with this. Thanks Roger!
If you would like to make an enhancement request to have this possibly change in a future version, feel free to post the idea on our feedback website: