Persist user workspaces on signout, guest workspaces on signin

- Issue MatterHackers/MCCentral#4699
Bed plate should be saved on sign out

MatterControlLib/ApplicationView/ApplicationController.cs

@@ -340,8 +340,15 @@ namespace MatterHackers.MatterControl
 			return popupMenu;
 		}
 
-		public void PersistUserTabs()
+		public async Task PersistUserTabs()
 		{
+			// Persist all pending changes in all workspaces to disk
+			foreach (var workspace in this.Workspaces)
+			{
+				await this.Tasks.Execute("Saving ".Localize() + $" \"{workspace.Name}\" ...",  workspace, workspace.SceneContext.SaveChanges);
+			}
+
+			// Project workspace definitions to serializable structure
 			var workspaces = this.Workspaces.Select(w =>
 			{
 				if (w.Printer == null)
@@ -360,7 +367,7 @@ namespace MatterHackers.MatterControl
 				}
 			});
 
-			// Persist part workspaces
+			// Persist workspace definitions to disk
 			File.WriteAllText(
 				ProfileManager.Instance.OpenTabsPath,
 				JsonConvert.SerializeObject(

MatterControlLib/RootSystemWindow.cs

@@ -297,29 +297,17 @@ namespace MatterHackers.MatterControl
 				// cancel the close so that we can save all our active work spaces
 				eventArgs.Cancel = true;
 
-				ApplicationController.Instance.PersistUserTabs();
-
 				UiThread.RunOnIdle(async () =>
 				{
 					var application = ApplicationController.Instance;
 
-					// Save changes before close
-					foreach (var printer in ApplicationController.Instance.ActivePrinters)
-					{
-						if (printer != PrinterConfig.EmptyPrinter)
-						{
-							await application.Tasks.Execute("Saving Print Bed".Localize() + "...", printer, printer.Bed.SaveChanges);
-						}
-					}
-
-					foreach (var workspace in application.Workspaces)
-					{
-						await application.Tasks.Execute("Saving Print Bed".Localize() + "...", workspace, workspace.SceneContext.SaveChanges);
-					}
+					await application.PersistUserTabs();
 
 					application.ApplicationExiting = true;
+
 					// Make sure we tell the Application Controller to shut down. This will release the slicing thread if running.
 					application.Shutdown();
+
 					this.CloseOnIdle();
 				});
 			}

MatterControlLib/Utilities/AuthenticationData.cs

@@ -86,7 +86,7 @@ namespace MatterHackers.MatterControl
 			ApplicationController.Instance.ChangeCloudSyncStatus(userAuthenticated: true);
 			AuthSessionChanged.CallEvents(null, null);
 		}
-		
+
 		public bool ClientAuthenticatedSessionValid
 		{
 			get