Skip save operation when on the EmptyProfile

- Fixes regression in MorePauseHandlingStreamTests

SlicerConfiguration/Settings/PrinterSettings.cs

@@ -189,6 +189,12 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 
 		public void Save()
 		{
+			// Skip save operation if on the EmptyProfile
+			if (!this.PrinterSelected)
+			{
+				return;
+			}
+
 			string json = JsonConvert.SerializeObject(this, Formatting.Indented);
 
 			// SHA1 value is based on UTF8 encoded file contents