[NEW] Web UI should be able to delete agents

[thomasmitchell]

Is your feature request related to a problem? Please describe. Please describe the problem you are trying to solve.

I want to be able to delete an agent from the Web UI with my mouse.

Describe the solution you'd like Please describe the desired behavior.

A button I can click to delete an agent.

Describe alternatives you've considered Please describe alternative solutions or features you have considered.

Using the CLI?