Blog Post
Hi Adam,
Officially it is not possible. but...
If you open the dashboard in Design mode
You can see that the combobox is connected to this component:
The Combobox is linked to this parameter:
And that is linking to a businessrule:
Unfortunately that one is encrypted.
You could try to replace this parameter by a delimited list with some time periods in it (as a first test). If that works you can try to link it to a memberlist to keep it dynamic. I've not tried it before.
However make sure you note your changes somewhere because if you upgrade to a newer version of the solution you need to make the change again. I usually make a change log for every marketplace solution that we use so with an upgrade we know exacty what to update. Looking forward to hear if you succeed.