Remove Run on Idle due too regression

- Added Additional guard to saving profile

ApplicationView/MainApplicationWidget.cs

@@ -549,7 +549,7 @@ namespace MatterHackers.MatterControl
 			Load?.Invoke(this, null);
 
 			// Pushing this after load fixes that empty printer list
-			UiThread.RunOnIdle(ApplicationController.Instance.UserChanged);
+			ApplicationController.Instance.UserChanged();
 
 			if (!System.IO.File.Exists(@"/storage/sdcard0/Download/LaunchTestPrint.stl"))
 			{

SlicerConfiguration/Settings/SettingsHelpers.cs

@@ -472,7 +472,8 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 					this.id = value;
 				}
 
-				if (File.Exists(ProfilePath))
+				// If the local file exists and the PrinterInfo has been added to ProfileManager, then it's safe to call profile.Save, otherwise...
+				if (File.Exists(ProfilePath) && ProfileManager.Instance[this.id] != null)
 				{
 					var profile = PrinterSettings.LoadFile(ProfilePath);
 					profile.ID = value;