Display sub-plugins when Stay in Script Editor is On

Currently, with stay_in_script_editor_on_node_selected as On, inspector_only is forcibly set, and no editors from the node selected are displayed.

With this change, if the selected Node has a Main Editor, it's still not shown (the intended behaviour of the feature), but the sub-editors are shown, this correctly opens the AnimationPlayerEditor plugin and other sub-plugins.

Fixes and closes #63621.

(cherry picked from commit eaaedb24a3c4dab33666c38b577e92312f315fe6)

editor/editor_node.cpp

@@ -2035,9 +2035,10 @@ void EditorNode::_edit_current(bool p_skip_foreign) {
 	Object *prev_inspected_object = get_inspector()->get_edited_object();
 
 	bool disable_folding = bool(EDITOR_GET("interface/inspector/disable_folding"));
-	bool stay_in_script_editor_on_node_selected = bool(EDITOR_GET("text_editor/navigation/stay_in_script_editor_on_node_selected"));
 	bool is_resource = current_obj->is_class("Resource");
 	bool is_node = current_obj->is_class("Node");
+	bool stay_in_script_editor_on_node_selected = bool(EDITOR_GET("text_editor/navigation/stay_in_script_editor_on_node_selected"));
+	bool skip_main_plugin = false;
 
 	String editable_warning; //none by default
 
@@ -2074,8 +2075,8 @@ void EditorNode::_edit_current(bool p_skip_foreign) {
 			node_dock->set_node(current_node);
 			scene_tree_dock->set_selected(current_node);
 			inspector_dock->update(current_node);
-			if (!inspector_only) {
-				inspector_only = stay_in_script_editor_on_node_selected && ScriptEditor::get_singleton()->is_visible_in_tree();
+			if (!inspector_only && !skip_main_plugin) {
+				skip_main_plugin = stay_in_script_editor_on_node_selected && ScriptEditor::get_singleton()->is_visible_in_tree();
 			}
 		} else {
 			node_dock->set_node(nullptr);
@@ -2151,7 +2152,7 @@ void EditorNode::_edit_current(bool p_skip_foreign) {
 			}
 		}
 
-		if (main_plugin) {
+		if (main_plugin && !skip_main_plugin) {
 			// special case if use of external editor is true
 			Resource *current_res = Object::cast_to<Resource>(current_obj);
 			if (main_plugin->get_name() == "Script" && current_obj->get_class_name() != StringName("VisualScript") && current_res && !current_res->get_path().empty() && current_res->get_path().find("::") == -1 && (bool(EditorSettings::get_singleton()->get("text_editor/external/use_external_editor")) || overrides_external_editor(current_obj))) {