SEBWIN-226: Replaced all usages of Dispatcher.BeginInvoke with Dispatcher.InvokeAsync.

SafeExamBrowser.Client/App.cs

@@ -83,7 +83,7 @@ namespace SafeExamBrowser.Client
 				base.Shutdown();
 			}
 
-			Dispatcher.BeginInvoke(new Action(shutdown));
+			Dispatcher.InvokeAsync(shutdown);
 		}
 	}
 }

SafeExamBrowser.UserInterface.Desktop/BrowserWindow.xaml.cs

@@ -98,7 +98,7 @@ namespace SafeExamBrowser.UserInterface.Desktop
 
 		public void UpdateIcon(IIconResource icon)
 		{
-			Dispatcher.BeginInvoke(new Action(() => Icon = new BitmapImage(icon.Uri)));
+			Dispatcher.InvokeAsync(() => Icon = new BitmapImage(icon.Uri));
 		}
 
 		public void UpdateLoadingState(bool isLoading)

SafeExamBrowser.UserInterface.Desktop/Controls/ApplicationButton.xaml.cs

@@ -89,11 +89,11 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 
 		private void Instance_OnTerminated(InstanceIdentifier id, ApplicationInstanceButton instanceButton)
 		{
-			Dispatcher.BeginInvoke(new Action(() =>
+			Dispatcher.InvokeAsync(() =>
 			{
 				instances.Remove(instances.FirstOrDefault(i => i.Id == id));
 				InstanceStackPanel.Children.Remove(instanceButton);
-			}));
+			});
 		}
 	}
 }

SafeExamBrowser.UserInterface.Desktop/Controls/ApplicationInstanceButton.xaml.cs

@@ -6,7 +6,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using System;
 using System.Windows;
 using System.Windows.Controls;
 using SafeExamBrowser.Contracts.Configuration;
@@ -44,7 +43,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 
 		private void Instance_IconChanged(IIconResource icon)
 		{
-			Dispatcher.BeginInvoke(new Action(() => Icon.Content = IconResourceLoader.Load(icon)));
+			Dispatcher.InvokeAsync(() => Icon.Content = IconResourceLoader.Load(icon));
 		}
 
 		private void Instance_NameChanged(string name)

SafeExamBrowser.UserInterface.Desktop/Controls/PowerSupplyControl.xaml.cs

@@ -6,7 +6,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-using System;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
@@ -33,7 +32,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 
 		public void SetBatteryCharge(double charge, BatteryChargeStatus status)
 		{
-			Dispatcher.BeginInvoke(new Action(() =>
+			Dispatcher.InvokeAsync(() =>
 			{
 				var width = BATTERY_CHARGE_MAX_WIDTH * charge;
 
@@ -44,27 +43,27 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 				BatteryCharge.Fill = status == BatteryChargeStatus.Low ? Brushes.Orange : BatteryCharge.Fill;
 				BatteryCharge.Fill = status == BatteryChargeStatus.Critical ? Brushes.Red : BatteryCharge.Fill;
 				Warning.Visibility = status == BatteryChargeStatus.Critical ? Visibility.Visible : Visibility.Collapsed;
-			}));
+			});
 		}
 
 		public void SetPowerGridConnection(bool connected)
 		{
-			Dispatcher.BeginInvoke(new Action(() => PowerPlug.Visibility = connected ? Visibility.Visible : Visibility.Collapsed));
+			Dispatcher.InvokeAsync(() => PowerPlug.Visibility = connected ? Visibility.Visible : Visibility.Collapsed);
 		}
 
 		public void SetTooltip(string text)
 		{
-			Dispatcher.BeginInvoke(new Action(() => Button.ToolTip = text));
+			Dispatcher.InvokeAsync(() => Button.ToolTip = text);
 		}
 
 		public void ShowCriticalBatteryWarning(string warning)
 		{
-			Dispatcher.BeginInvoke(new Action(() => ShowPopup(warning)));
+			Dispatcher.InvokeAsync(() => ShowPopup(warning));
 		}
 
 		public void ShowLowBatteryInfo(string info)
 		{
-			Dispatcher.BeginInvoke(new Action(() => ShowPopup(info)));
+			Dispatcher.InvokeAsync(() => ShowPopup(info));
 		}
 
 		private void ShowPopup(string text)

SafeExamBrowser.UserInterface.Desktop/Controls/WirelessNetworkControl.xaml.cs

@@ -26,11 +26,11 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 		{
 			set
 			{
-				Dispatcher.BeginInvoke(new Action(() =>
+				Dispatcher.InvokeAsync(() =>
 				{
 					Button.IsEnabled = value;
 					NoAdapterIcon.Visibility = value ? Visibility.Collapsed : Visibility.Visible;
-				}));
+				});
 			}
 		}
 
@@ -38,12 +38,12 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 		{
 			set
 			{
-				Dispatcher.Invoke(new Action(() =>
+				Dispatcher.Invoke(() =>
 				{
 					LoadingIcon.Visibility = value ? Visibility.Visible : Visibility.Collapsed;
 					SignalStrengthIcon.Visibility = value ? Visibility.Collapsed : Visibility.Visible;
 					NetworkStatusIcon.Visibility = value ? Visibility.Collapsed : Visibility.Visible;
-				}));
+				});
 			}
 		}
 
@@ -51,13 +51,13 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 		{
 			set
 			{
-				Dispatcher.BeginInvoke(new Action(() =>
+				Dispatcher.InvokeAsync(() =>
 				{
 					var icon = value == WirelessNetworkStatus.Connected ? FontAwesomeIcon.Check : FontAwesomeIcon.Close;
 					var brush = value == WirelessNetworkStatus.Connected ? Brushes.Green : Brushes.Orange;
 
 					NetworkStatusIcon.Source = ImageAwesome.CreateImageSource(icon, brush);
-				}));
+				});
 			}
 		}
 
@@ -76,12 +76,12 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 
 		public void SetTooltip(string text)
 		{
-			Dispatcher.BeginInvoke(new Action(() => Button.ToolTip = text));
+			Dispatcher.InvokeAsync(() => Button.ToolTip = text);
 		}
 
 		public void Update(IEnumerable<IWirelessNetwork> networks)
 		{
-			Dispatcher.BeginInvoke(new Action(() =>
+			Dispatcher.InvokeAsync(() =>
 			{
 				NetworksStackPanel.Children.Clear();
 
@@ -106,7 +106,7 @@ namespace SafeExamBrowser.UserInterface.Desktop.Controls
 
 					NetworksStackPanel.Children.Add(button);
 				}
-			}));
+			});
 		}
 
 		private void InitializeWirelessNetworkControl()