OpenXR: fix casts and loop in action map editor

This commit replaces potentially unsafe static casts with
Object::cast_to and fixes the order in which UI elements are looped over
when removing controls. This fixes crashes and wrong data being
displayed in the OpenXR action map editor when saving or resetting
action maps.

modules/openxr/editor/openxr_action_map_editor.cpp

@@ -57,7 +57,7 @@ void OpenXRActionMapEditor::_notification(int p_what) {
 		case NOTIFICATION_ENTER_TREE:
 		case NOTIFICATION_THEME_CHANGED: {
 			for (int i = 0; i < tabs->get_child_count(); i++) {
-				Control *tab = static_cast<Control *>(tabs->get_child(i));
+				Control *tab = Object::cast_to<Control>(tabs->get_child(i));
 				if (tab) {
 					tab->add_theme_style_override("panel", get_theme_stylebox(SNAME("panel"), SNAME("Tree")));
 				}
@@ -208,7 +208,7 @@ void OpenXRActionMapEditor::_on_remove_action_set(Object *p_action_set_editor) {
 void OpenXRActionMapEditor::_on_action_removed() {
 	for (int i = 0; i < tabs->get_tab_count(); i++) {
 		// First tab won't be an interaction profile editor, but being thorough..
-		OpenXRInteractionProfileEditorBase *interaction_profile_editor = static_cast<OpenXRInteractionProfileEditorBase *>(tabs->get_tab_control(i));
+		OpenXRInteractionProfileEditorBase *interaction_profile_editor = Object::cast_to<OpenXRInteractionProfileEditorBase>(tabs->get_tab_control(i));
 		if (interaction_profile_editor) {
 		}
 	}
@@ -309,7 +309,7 @@ void OpenXRActionMapEditor::_on_tabs_tab_changed(int p_tab) {
 }
 
 void OpenXRActionMapEditor::_on_tab_button_pressed(int p_tab) {
-	OpenXRInteractionProfileEditorBase *interaction_profile_editor = static_cast<OpenXRInteractionProfileEditorBase *>(tabs->get_tab_control(p_tab));
+	OpenXRInteractionProfileEditorBase *interaction_profile_editor = Object::cast_to<OpenXRInteractionProfileEditorBase>(tabs->get_tab_control(p_tab));
 	ERR_FAIL_NULL(interaction_profile_editor);
 
 	undo_redo->create_action(TTR("Remove interaction profile"));
@@ -375,9 +375,9 @@ void OpenXRActionMapEditor::_clear_action_map() {
 		child->queue_free();
 	}
 
-	for (int i = 0; i < tabs->get_tab_count(); i++) {
+	for (int i = tabs->get_tab_count() - 1; i >= 0; --i) {
 		// First tab won't be an interaction profile editor, but being thorough..
-		OpenXRInteractionProfileEditorBase *interaction_profile_editor = static_cast<OpenXRInteractionProfileEditorBase *>(tabs->get_tab_control(i));
+		OpenXRInteractionProfileEditorBase *interaction_profile_editor = Object::cast_to<OpenXRInteractionProfileEditorBase>(tabs->get_tab_control(i));
 		if (interaction_profile_editor) {
 			tabs->remove_child(interaction_profile_editor);
 			interaction_profile_editor->queue_free();

modules/openxr/editor/openxr_interaction_profile_editor.cpp

@@ -308,7 +308,7 @@ void OpenXRInteractionProfileEditor::_update_interaction_profile() {
 
 void OpenXRInteractionProfileEditor::_theme_changed() {
 	for (int i = 0; i < main_hb->get_child_count(); i++) {
-		Control *panel = static_cast<Control *>(main_hb->get_child(i));
+		Control *panel = Object::cast_to<Control>(main_hb->get_child(i));
 		if (panel) {
 			panel->add_theme_style_override("panel", get_theme_stylebox(SNAME("panel"), SNAME("TabContainer")));
 		}

modules/openxr/editor/openxr_select_action_dialog.cpp

@@ -47,7 +47,7 @@ void OpenXRSelectActionDialog::_notification(int p_what) {
 void OpenXRSelectActionDialog::_on_select_action(const String p_action) {
 	if (selected_action != "") {
 		NodePath button_path = action_buttons[selected_action];
-		Button *button = static_cast<Button *>(get_node(button_path));
+		Button *button = Object::cast_to<Button>(get_node(button_path));
 		if (button != nullptr) {
 			button->set_flat(true);
 		}
@@ -57,7 +57,7 @@ void OpenXRSelectActionDialog::_on_select_action(const String p_action) {
 
 	if (selected_action != "") {
 		NodePath button_path = action_buttons[selected_action];
-		Button *button = static_cast<Button *>(get_node(button_path));
+		Button *button = Object::cast_to<Button>(get_node(button_path));
 		if (button != nullptr) {
 			button->set_flat(false);
 		}

modules/openxr/editor/openxr_select_interaction_profile_dialog.cpp

@@ -46,7 +46,7 @@ void OpenXRSelectInteractionProfileDialog::_notification(int p_what) {
 void OpenXRSelectInteractionProfileDialog::_on_select_interaction_profile(const String p_interaction_profile) {
 	if (selected_interaction_profile != "") {
 		NodePath button_path = ip_buttons[selected_interaction_profile];
-		Button *button = static_cast<Button *>(get_node(button_path));
+		Button *button = Object::cast_to<Button>(get_node(button_path));
 		if (button != nullptr) {
 			button->set_flat(true);
 		}
@@ -56,7 +56,7 @@ void OpenXRSelectInteractionProfileDialog::_on_select_interaction_profile(const
 
 	if (selected_interaction_profile != "") {
 		NodePath button_path = ip_buttons[selected_interaction_profile];
-		Button *button = static_cast<Button *>(get_node(button_path));
+		Button *button = Object::cast_to<Button>(get_node(button_path));
 		if (button != nullptr) {
 			button->set_flat(false);
 		}