### 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
String distribution_name = OS::get_singleton()->get_distribution_name();
	if (distribution_name.is_empty()) {
		distribution_name = OS::get_singleton()->get_name();
	}
	if (distribution_name.is_empty()) {
		distribution_name = "Other";
	}
	const String distribution_version = OS::get_singleton()->get_version();
	String godot_version = "Godot v" + String(VERSION_FULL_CONFIG);
	if (String(VERSION_BUILD) != "official") {
		String hash = String(VERSION_HASH);
		hash = hash.is_empty() ? String("unknown") : vformat("(%s)", hash.left(9));
		godot_version += " " + hash;
	}
#ifdef LINUXBSD_ENABLED
	const String display_server = OS::get_singleton()->get_environment("XDG_SESSION_TYPE").capitalize().replace(" ", ""); 
#endif 
	String driver_name = GLOBAL_GET("rendering/rendering_device/driver");
	String rendering_method = GLOBAL_GET("rendering/renderer/rendering_method");
	const String rendering_device_name = RenderingServer::get_singleton()->get_video_adapter_name();
	RenderingDevice::DeviceType device_type = RenderingServer::get_singleton()->get_video_adapter_type();
	String device_type_string;
	switch (device_type) {
		case RenderingDevice::DeviceType::DEVICE_TYPE_INTEGRATED_GPU:
			device_type_string = "integrated";
			break;
		case RenderingDevice::DeviceType::DEVICE_TYPE_DISCRETE_GPU:
			device_type_string = "dedicated";
			break;