### Godot version

master

### System information

Godot v4.2.beta (0ea75d77c) - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2070 (NVIDIA; 31.0.15.3598) - Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz (12 Threads)

### Issue description

When any of the Import, Filesystem, Node, or History docks are floating, changing an editor feature crashes the engine.
Changing any setting or selecting a different profile triggers it.

This is because `EditorNode::_feature_profile_changed` assumes the docks are in a `TabContainer`, and if they are floating they aren't in one.


### Steps to reproduce

Make any of these docks floating: Import, Filesystem, Node, or History
Open Editor Features (Editor -> Manage Editor Features...)
Make a profile (if you have none) or change a setting on the existing profile

### Minimal reproduction project

n/a
for (int i = 0; i < editor_data.get_edited_scene_count(); i++) {
		Node *scene = editor_data.get_edited_scene_root(i);
		if (scene && p_scene_paths.has(scene->get_scene_file_path())) {
			_save_scene(scene->get_scene_file_path(), i);
		}
	}
}
void EditorNode::save_before_run() {
	current_menu_option = FILE_SAVE_AND_RUN;
	_menu_option_confirm(FILE_SAVE_AS_SCENE, true);
	file->set_title(TTR("Save scene before running..."));
}
void EditorNode::try_autosave() {
	if (!bool(EDITOR_GET("run/auto_save/save_before_running"))) {
		return;
	}
	if (unsaved_cache) {
		Node *scene = editor_data.get_edited_scene_root();
		if (scene && !scene->get_scene_file_path().is_empty()) { 
			_save_scene_with_preview(scene->get_scene_file_path());
		}
	}
	_menu_option(FILE_SAVE_ALL_SCENES);
	editor_data.save_editor_external_data();
}
void EditorNode::restart_editor() {