Remove DHCP leases over webGUI

[codinghorror]

@DanSchaper

I guess it would depend on the value of the feature for your use?

@codinghorror

I too would like this feature.. would be cool to have a "remove this DNS entry now please" button in the UI, something like this:

I can sponsor the feature, per my mockup! How does $250 sound? Just add a little red trashcan button next to the copy button, press it, and bam, DHCP lease cleared for that entry?