### 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
ERR_FAIL_NULL_V(p_object, false);
	Ref<Script> scr = p_object->get_script();
	if (scr.is_null() && Object::cast_to<Script>(p_object)) {
		scr = p_object;
	}
	if (scr.is_valid()) {
		Ref<Script> base_script = scr;
		while (base_script.is_valid()) {
			StringName name = EditorNode::get_editor_data().script_class_get_name(base_script->get_path());
			if (name == p_class) {
				return true;
			}
			base_script = base_script->get_base_script();
		}
	}
	return false;
}
void EditorNode::progress_add_task(const String &p_task, const String &p_label, int p_steps, bool p_can_cancel) {
	if (singleton->cmdline_export_mode) {
		print_line(p_task + ": begin: " + p_label + " steps: " + itos(p_steps));
	} else if (singleton->progress_dialog) {
		singleton->progress_dialog->add_task(p_task, p_label, p_steps, p_can_cancel);
	}
}
bool EditorNode::progress_task_step(const String &p_task, const String &p_state, int p_step, bool p_force_refresh) {