Clearer Advanced config

[Vartkat]

Is your feature request related to a problem? Please describe.
The Custom week days are supposed to be within the Use date range and that's not clear in the interface. I first (and I think others can do it) understood that was exclusive, i.e. Use date range or Use week days

Describe the solution you'd like
I know it's difficult to make it clear in the interface but there could be two helpfull things :
1- When hours are set for the Date range these hours should automtically go to each day as there can't be a day with a longer range than the one for the Date range
2- Just put a notice - replace “Custom week days" by "Custom week days (within date range)"

Describe alternatives you've considered
see solution suggested

Additional context
none