### 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
center_split->set_split_offset(old_split_ofs);
}
void EditorNode::_add_to_recent_scenes(const String &p_scene) {
	Array rc = EditorSettings::get_singleton()->get_project_metadata("recent_files", "scenes", Array());
	if (rc.has(p_scene)) {
		rc.erase(p_scene);
	}
	rc.push_front(p_scene);
	if (rc.size() > 10) {
		rc.resize(10);
	}
	EditorSettings::get_singleton()->set_project_metadata("recent_files", "scenes", rc);
	_update_recent_scenes();
}
void EditorNode::_open_recent_scene(int p_idx) {
	if (p_idx == recent_scenes->get_item_count() - 1) {
		EditorSettings::get_singleton()->set_project_metadata("recent_files", "scenes", Array());
		call_deferred(SNAME("_update_recent_scenes"));
	} else {
		Array rc = EditorSettings::get_singleton()->get_project_metadata("recent_files", "scenes", Array());
		ERR_FAIL_INDEX(p_idx, rc.size());
		if (load_scene(rc[p_idx]) != OK) {
			rc.remove_at(p_idx);
			EditorSettings::get_singleton()->set_project_metadata("recent_files", "scenes", rc);
			_update_recent_scenes();
		}
	}
}
void EditorNode::_update_recent_scenes() {