QueryWindow: Minor improvements

Elwig/Windows/QueryWindow.xaml.cs

@@ -6,14 +6,26 @@ using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
+using System.Windows.Input;
 
 namespace Elwig.Windows {
     public partial class QueryWindow : Window {
+
+        private ICommand? _enterCommand;
+        public ICommand EnterCommand => _enterCommand ??= new ActionCommand(async () => {
+            await ExecuteQuery();
+        });
+
+
         public QueryWindow() {
             InitializeComponent();
         }
 
         private async void QueryButton_Click(object sender, RoutedEventArgs evt) {
+            await ExecuteQuery();
+        }
+
+        private async Task ExecuteQuery() {
             try {
                 await ExecuteQuery(QueryInput.Text);
             } catch (Exception e) {