Merge remote-tracking branch 'origin/master' into 1.7

Source/Engine/Engine/NativeInterop.Unmanaged.cs

@@ -1230,7 +1230,7 @@ namespace FlaxEngine.Interop
         internal static bool GetTypeIsReference(ManagedHandle typeHandle)
         {
             Type type = Unsafe.As<TypeHolder>(typeHandle.Target);
-            return type.IsByRef;
+            return !type.IsValueType; // Maybe also type.IsByRef?
         }
 
         [UnmanagedCallersOnly]

Source/Engine/Engine/Screen.cpp

@@ -181,6 +181,11 @@ void Screen::SetGameWindowMode(GameWindowMode windowMode)
 #endif
 }
 
+Window* Screen::GetMainWindow()
+{
+    return Engine::MainWindow;
+}
+
 void ScreenService::Update()
 {
 #if USE_EDITOR

Source/Engine/Engine/Screen.h

@@ -96,4 +96,10 @@ DECLARE_SCRIPTING_TYPE_NO_SPAWN(Screen);
     /// </remarks>
     /// <param name="windowMode">The window mode.</param>
     API_PROPERTY() static void SetGameWindowMode(GameWindowMode windowMode);
+
+    /// <summary>
+    /// Gets the main window.
+    /// </summary>
+    /// <returns>The current window. Will be null if fails.</returns>
+    API_PROPERTY() static Window* GetMainWindow();
 };