[Suggestion] Do not delete calendar data, modify instead

Hi.

When I go to admin to set some new datas on a period or a single date that are already entered, the plugin fields do not display the current datas, but blank fields that I must completely re-enter.

I think it will be better if was possible to view and modify the pre-entered datas instead of actual method.

Please, consider my suggestion.
Thank you.

https://www.ads-software.com/plugins/booking-system/