close settings with esc

Wox/HotkeyControl.xaml.cs

@@ -108,5 +108,10 @@ namespace Wox
 
             return false;
         }
+
+        public new bool IsFocused
+        {
+            get { return tbHotkey.IsFocused; }
+        }
     }
 }

Wox/SettingWindow.xaml

@@ -11,7 +11,7 @@
 		Title="{DynamicResource woxsettings}"
 		ResizeMode="NoResize"
 		WindowStartupLocation="CenterScreen"
-		Height="600" Width="800">
+		Height="600" Width="800" PreviewKeyDown="Window_PreviewKeyDown">
     <Window.Resources>
         <ListBoxItem HorizontalContentAlignment="Stretch"
 					IsEnabled="False"

Wox/SettingWindow.xaml.cs

@@ -774,5 +774,14 @@ namespace Wox
         }
 
         #endregion
+
+        private void Window_PreviewKeyDown(object sender, System.Windows.Input.KeyEventArgs e)
+        {
+            // Hide window with ESC, but make sure it is not pressed as a hotkey
+            if (e.Key == Key.Escape && !ctlHotkey.IsFocused)
+            {
+                Close();
+            }
+        }
     }
 }