Sandboxie Control generates multiple separators after creating a new sandbox

[isaak654]

David assured me that this is a trivial UI issue, but it could be forgotten, so I'm reporting it here.
It can be reproduced on both Sandboxie Classic & Plus (because Sbiectrl is on both).

Steps to reproduce the behavior:

1. Create a new cmd file as this and place it to the Sandboxie installation folder
2. Open SbieCtrl.exe in the Sandboxie installation folder
3. Now run the cmd file with a double click
4. Return to SbieCtrl.exe and click on the Sandbox menu multiple times.
5. See the number of multiple lines created under my list of sandboxes - the number of lines matches the number of times I clicked on the Sandbox menu:
   

Workaround: Exit & reopen SbieCtrl.exe, you will find the new sandbox created by the script without the lines.

Additional context:
It's a documented issue since 2017 or less: https://sandboxie-website-archive.github.io/www.sandboxie.com/old-forums/viewtopica6bca6bc.html#p126947