Quickfix editor hangs when rooting a window with exclusive and transient flags enabled

scene/main/window.cpp

@@ -154,7 +154,7 @@ void Window::set_flag(Flags p_flag, bool p_enabled) {
 
 	} else if (window_id != DisplayServer::INVALID_WINDOW_ID) {
 #ifdef TOOLS_ENABLED
-		if ((p_flag != FLAG_POPUP) || !(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+		if ((p_flag != FLAG_POPUP) || !(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 			DisplayServer::get_singleton()->window_set_flag(DisplayServer::WindowFlags(p_flag), p_enabled, window_id);
 		}
 #else
@@ -167,7 +167,7 @@ bool Window::get_flag(Flags p_flag) const {
 	ERR_FAIL_INDEX_V(p_flag, FLAG_MAX, false);
 	if (window_id != DisplayServer::INVALID_WINDOW_ID) {
 #ifdef TOOLS_ENABLED
-		if ((p_flag != FLAG_POPUP) || !(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+		if ((p_flag != FLAG_POPUP) || !(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 			flags[p_flag] = DisplayServer::get_singleton()->window_get_flag(DisplayServer::WindowFlags(p_flag), window_id);
 		}
 #else
@@ -256,7 +256,7 @@ void Window::_make_window() {
 	DisplayServer::get_singleton()->window_set_title(tr_title, window_id);
 	DisplayServer::get_singleton()->window_attach_instance_id(get_instance_id(), window_id);
 #ifdef TOOLS_ENABLED
-	if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+	if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 		DisplayServer::get_singleton()->window_set_exclusive(window_id, exclusive);
 	} else {
 		DisplayServer::get_singleton()->window_set_exclusive(window_id, false);
@@ -445,7 +445,7 @@ void Window::set_visible(bool p_visible) {
 	if (transient_parent) {
 		if (exclusive && visible) {
 #ifdef TOOLS_ENABLED
-			if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+			if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 				ERR_FAIL_COND_MSG(transient_parent->exclusive_child && transient_parent->exclusive_child != this, "Transient parent has another exclusive child.");
 				transient_parent->exclusive_child = this;
 			}
@@ -499,7 +499,7 @@ void Window::_make_transient() {
 		if (is_inside_tree() && is_visible() && exclusive) {
 			if (transient_parent->exclusive_child == nullptr) {
 #ifdef TOOLS_ENABLED
-				if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+				if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 					transient_parent->exclusive_child = this;
 				}
 #else
@@ -548,7 +548,7 @@ void Window::set_exclusive(bool p_exclusive) {
 
 	if (!embedder && window_id != DisplayServer::INVALID_WINDOW_ID) {
 #ifdef TOOLS_ENABLED
-		if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+		if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 			DisplayServer::get_singleton()->window_set_exclusive(window_id, exclusive);
 		} else {
 			DisplayServer::get_singleton()->window_set_exclusive(window_id, false);
@@ -562,7 +562,7 @@ void Window::set_exclusive(bool p_exclusive) {
 		if (p_exclusive && is_inside_tree() && is_visible()) {
 			ERR_FAIL_COND_MSG(transient_parent->exclusive_child && transient_parent->exclusive_child != this, "Transient parent has another exclusive child.");
 #ifdef TOOLS_ENABLED
-			if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+			if (!(Engine::get_singleton()->is_editor_hint() && get_tree()->get_edited_scene_root() && (get_tree()->get_edited_scene_root()->is_ancestor_of(this) || get_tree()->get_edited_scene_root() == this))) {
 				transient_parent->exclusive_child = this;
 			}
 #else