Adding ability to specify "Not Compatible" bed temperature in material settings

Adding 'NC' to many material settings
Require bed temps for all bed types in all materials

MatterControlLib/ActionBar/TemperatureWidgetBed.cs

@@ -28,7 +28,6 @@ either expressed or implied, of the FreeBSD Project.
 */
 
 using System;
-using System.Collections.Generic;
 using System.Linq;
 using MatterHackers.Agg;
 using MatterHackers.Agg.Platform;