auto_edging_duration_minutes should not be limited to 300 mins.

[LanceLake]

For those who like the idea of having it go all night, 5 hours isn't going to cut it. Allow us to set 720 at least if there needs to be a max limit. 9999 would be preferable, but at least 720 is 12 hours, so it needs to be "reset" twice a day for those who want to do this multi-days.

[B4ben-69]

see pull request #92

[LanceLake]

Yes. This request still applies since that pull isn't approved yet.