Ability to duplicate materials

[JamesTKhan]

Is your feature request related to a problem? Please describe.
If you are reusing the same model but want to use different materials, you have to create a new material manually and then assign it, and assign all the same attributes that you want to keep the same. This is cumbersome.

Describe the solution you'd like
The ability to duplicate materials would save alot of time and hassle so that materials can be duplicated and then only change what you need changed while keeping everything else the same.