Be able to update DNS Zone Refesh time from Server GUI/CLI

[ledoktre]

Is your feature request related to a problem? Please describe.
We use the Hestia DNS module to manage DNS records only and use NOTIFY to pass zones to a DNS service we subscribe to. I would like to be able to modify the REFRESH so that it does not check for updates every 2 hours. If I update /usr/local/hestia/func/domain.sh file, it works but is overwritten on subsequent updates

Describe the solution you'd like
The ability to modify the REFRESH time and have it permanently save the setting. GUI is best, CLI would be fine too.

Describe alternatives you've considered
Modify the /usr/local/hestia/func/domain.sh file and watch for it to be overwritten.

Additional context
None