Add a way to give control over individual emitters

One thing would be to add a way to control individual emitters. Example: If you wanted only one emitter in the scene to be active, move the cursor over that specific emitter and then change its properties in a new area in the materials tab.
Another thing would be to add a way to change blockstate properties. Example: Redstone lamps can be lit or unlit. Add a way to change properties of unlit lamps.