### 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
break;
			case 1:
				EditorScale::set_scale(0.75);
				break;
			case 2:
				EditorScale::set_scale(1.0);
				break;
			case 3:
				EditorScale::set_scale(1.25);
				break;
			case 4:
				EditorScale::set_scale(1.5);
				break;
			case 5:
				EditorScale::set_scale(1.75);
				break;
			case 6:
				EditorScale::set_scale(2.0);
				break;
			default:
				EditorScale::set_scale(EDITOR_GET("interface/editor/custom_display_scale"));
				break;
		}
	}
	
	Window *w = Object::cast_to<Window>(SceneTree::get_singleton()->get_root());
	if (w) {
		w->set_min_size(Size2(1024, 600) * EDSCALE);
	}
	EditorFileDialog::set_default_show_hidden_files(EDITOR_GET("filesystem/file_dialog/show_hidden_files"));