Refine editor window architecture

editor/app/UtilityWindows/EditorUtilityWindowRegistry.cpp

@@ -9,10 +9,23 @@ namespace {
 
 using ::XCEngine::UI::UISize;
 
+constexpr EditorWindowChromePolicy kUtilityWindowChromePolicy = {
+    .allowDetachedTitleBarTabStrip = false,
+    .showFrameStats = false,
+};
+
+constexpr EditorWindowNativeStylePolicy kUtilityWindowNativeStylePolicy = {
+    .extendedWindowStyle = WS_EX_TOOLWINDOW,
+    .windowStyle = 0,
+    .useHostWindowStyle = true,
+};
+
 constexpr EditorUtilityWindowDescriptor kColorPickerUtilityWindowDescriptor = {
     .kind = EditorUtilityWindowKind::ColorPicker,
     .windowId = "utility.color-picker",
     .title = L"Color Picker",
+    .chromePolicy = kUtilityWindowChromePolicy,
+    .nativeStylePolicy = kUtilityWindowNativeStylePolicy,
     .preferredOuterSize = UISize(352.0f, 500.0f),
     .minimumOuterSize = UISize(320.0f, 460.0f),
 };
@@ -21,6 +34,8 @@ constexpr EditorUtilityWindowDescriptor kAddComponentUtilityWindowDescriptor = {
     .kind = EditorUtilityWindowKind::AddComponent,
     .windowId = "utility.add-component",
     .title = L"Add Component",
+    .chromePolicy = kUtilityWindowChromePolicy,
+    .nativeStylePolicy = kUtilityWindowNativeStylePolicy,
     .preferredOuterSize = UISize(352.0f, 500.0f),
     .minimumOuterSize = UISize(320.0f, 460.0f),
 };