Don't force borderless mode when using per-pixel transparency

platform/osx/os_osx.mm

@@ -2661,7 +2661,6 @@ void OS_OSX::set_window_per_pixel_transparency_enabled(bool p_enabled) {
 	if (!is_layered_allowed()) return;
 	if (layered_window != p_enabled) {
 		if (p_enabled) {
-			set_borderless_window(true);
 			GLint opacity = 0;
 			[window_object setBackgroundColor:[NSColor clearColor]];
 			[window_object setOpaque:NO];
@@ -2691,9 +2690,6 @@ void OS_OSX::set_borderless_window(bool p_borderless) {
 	if (p_borderless) {
 		[window_object setStyleMask:NSWindowStyleMaskBorderless];
 	} else {
-		if (layered_window)
-			set_window_per_pixel_transparency_enabled(false);
-
 		[window_object setStyleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable | (resizable ? NSWindowStyleMaskResizable : 0)];
 
 		// Force update of the window styles

platform/windows/os_windows.cpp

@@ -2210,7 +2210,6 @@ void OS_Windows::set_window_per_pixel_transparency_enabled(bool p_enabled) {
 	if (!is_layered_allowed()) return;
 	if (layered_window != p_enabled) {
 		if (p_enabled) {
-			set_borderless_window(true);
 			//enable per-pixel alpha
 
 			DWM_BLURBEHIND bb = { 0 };
@@ -2239,9 +2238,6 @@ void OS_Windows::set_borderless_window(bool p_borderless) {
 	if (video_mode.borderless_window == p_borderless)
 		return;
 
-	if (!p_borderless && layered_window)
-		set_window_per_pixel_transparency_enabled(false);
-
 	video_mode.borderless_window = p_borderless;
 
 	preserve_window_size = true;

platform/x11/os_x11.cpp

@@ -964,7 +964,6 @@ void OS_X11::set_window_per_pixel_transparency_enabled(bool p_enabled) {
 	if (!is_layered_allowed()) return;
 	if (layered_window != p_enabled) {
 		if (p_enabled) {
-			set_borderless_window(true);
 			layered_window = true;
 		} else {
 			layered_window = false;
@@ -1683,9 +1682,6 @@ void OS_X11::set_borderless_window(bool p_borderless) {
 	if (get_borderless_window() == p_borderless)
 		return;
 
-	if (!p_borderless && layered_window)
-		set_window_per_pixel_transparency_enabled(false);
-
 	current_videomode.borderless_window = p_borderless;
 
 	Hints hints;