Rename 'Exit' button to Logout and fix app crashing on clicking stop assessment button (#124)

Author: akshayrohilla

src/MainWindow.xaml

@@ -114,7 +114,7 @@
                         <SymbolIcon Symbol="Document"/>
                     </NavigationViewItem.Icon>
                 </NavigationViewItem>
-                <NavigationViewItem Style="{StaticResource NavigationViewItemStyle}" Content="Exit" Tag="Close" x:Name="BottomDockCloseButton">
+                <NavigationViewItem Style="{StaticResource NavigationViewItemStyle}" Content="Logout" Tag="Close" x:Name="BottomDockCloseButton" Tapped="BottomDockCloseButton_Tapped">
                     <NavigationViewItem.Icon>
                         <SymbolIcon Symbol="ClosePane"/>
                     </NavigationViewItem.Icon>

src/MainWindow.xaml.cs

@@ -672,7 +672,7 @@ private async Task<bool> DisplayAlert(string title, string content, string prima
             var result = await dialog.ShowAsync();
             if(result == ContentDialogResult.Primary)
             {
-                Application.Current.Exit();
+                return result == ContentDialogResult.Primary;
             }
             return result == ContentDialogResult.Secondary;
         }
@@ -1524,6 +1524,11 @@ private void HelperDocButton_Tapped(object sender, TappedRoutedEventArgs e)
             var success = Windows.System.Launcher.LaunchUriAsync(uri);
         }
 
+        private void BottomDockCloseButton_Tapped(object sender, TappedRoutedEventArgs e)
+        {
+            CloseForm();
+        }
+
         public void SetHasImportInventory(bool hasImportInventory)
         {
             HasImportInventory = hasImportInventory;