refactor: bind Tasks as ItemSource from the XAML rather than the code behind

Author: Xiphereal

Desktop/Project/TasksList.xaml

@@ -18,7 +18,7 @@
                 <Button AutomationProperties.AutomationId="AddTask" Content="_Add task" Command="{Binding Add}" />
             </StackPanel>
 
-            <ListBox Name="Tasks">
+            <ListBox ItemsSource="{Binding Tasks}">
                 <ListBox.ItemTemplate>
                     <DataTemplate DataType="{x:Type domain:Task}">
                         <StackPanel Orientation="Horizontal">

Desktop/Project/TasksList.xaml.cs

@@ -12,7 +12,6 @@ public TasksList(TaskListViewModel viewModel)
         DataContext = viewModel;
 
         InitializeComponent();
-        Tasks.ItemsSource = viewModel.Tasks;
 
         viewModel.PopulateTasks();
         viewModel.TaskCreationViewCreator = creationViewModel =>