### 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
InspectorDock::get_singleton()->edit_resource(p_resource);
}
void EditorNode::save_resource_in_path(const Ref<Resource> &p_resource, const String &p_path) {
	editor_data.apply_changes_in_editors();
	if (saving_resources_in_path.has(p_resource)) {
		return;
	}
	saving_resources_in_path.insert(p_resource);
	int flg = 0;
	if (EDITOR_GET("filesystem/on_save/compress_binary_resources")) {
		flg |= ResourceSaver::FLAG_COMPRESS;
	}
	String path = ProjectSettings::get_singleton()->localize_path(p_path);
	Error err = ResourceSaver::save(p_resource, path, flg | ResourceSaver::FLAG_REPLACE_SUBRESOURCE_PATHS);
	if (err != OK) {
		if (ResourceLoader::is_imported(p_resource->get_path())) {
			show_accept(TTR("Imported resources can't be saved."), TTR("OK"));
		} else {
			show_accept(TTR("Error saving resource!"), TTR("OK"));
		}
		saving_resources_in_path.erase(p_resource);
		return;
	}
	((Resource *)p_resource.ptr())->set_path(path);
	saving_resources_in_path.erase(p_resource);
	_resource_saved(p_resource, path);
	emit_signal(SNAME("resource_saved"), p_resource);
	editor_data.notify_resource_saved(p_resource);
}
void EditorNode::save_resource(const Ref<Resource> &p_resource) {