[Bug] distrobox-export --app foo --export-label " " addes some spaces at the end

[dnkmmr69420]

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Describe the bug
Some spaces are added at the end when the command is used which will cause the app name to not be center

To Reproduce
Type distrobox-export --app foo --export-label " " then spaces are added and can be found when editing the .desktop file

Expected behavior
It should just export without the spaces

Logs
Run the commands with --verbose and post the log here as a file upload
Attach also the output of podman logs or docker logs, possibly with --latest flag

Desktop (please complete the following information):

• Are you using podman, docker or lilipod?
• Which version or podman, docker or lilipod?
• Which version of distrobox?
• Which host distribution?
• How did you install distrobox?

Additional context
Maybe having a --no-label flag that can be used to not have a label added when app is being exported