First, well done on the update to 4.0! I haven't had a lot of time to play with it yet but it looks great.
I'd like to put in a request for a feature.
On the settings>dhcp page, it would be nice if the user could resize the frames for the list of active DHCP leases and the static DHCP leases.
This is more of a quality-of-life improvement and not anything that would be deemed high priority. Being able to look at the whole list, or a larger portion of it for long lists, would be very beneficial for people modifying the static lease list.
Again, thank you to the Pi-Hole team! Keep up the awesome work!!