Worldedit should have a warning system

**Is your feature request related to a problem? Please describe.**
The problem is when i tries to replace fences with walls i forgot to put the id at the end and it just crashed my server and the world is not saved

**Describe the solution you'd like**
World edit should have a warning system like if a near command like replacenear have a big area number it would pop up a warning and ask for the user to confirm the edit

**Describe alternatives you've considered**

**Additional context**