### 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
disk_changed_list->set_v_size_flags(Control::SIZE_EXPAND_FILL);
		disk_changed->connect("confirmed", callable_mp(this, &EditorNode::_reload_modified_scenes));
		disk_changed->connect("confirmed", callable_mp(this, &EditorNode::_reload_project_settings));
		disk_changed->set_ok_button_text(TTR("Reload"));
		disk_changed->add_button(TTR("Resave"), !DisplayServer::get_singleton()->get_swap_cancel_ok(), "resave");
		disk_changed->connect("custom_action", callable_mp(this, &EditorNode::_resave_scenes));
	}
	gui_base->add_child(disk_changed);
	add_editor_plugin(memnew(AnimationPlayerEditorPlugin));
	add_editor_plugin(memnew(AnimationTrackKeyEditEditorPlugin));
	add_editor_plugin(memnew(CanvasItemEditorPlugin));
	add_editor_plugin(memnew(Node3DEditorPlugin));
	add_editor_plugin(memnew(ScriptEditorPlugin));
	EditorAudioBuses *audio_bus_editor = EditorAudioBuses::register_editor();
	ScriptTextEditor::register_editor(); 
	TextEditor::register_editor();
	if (AssetLibraryEditorPlugin::is_available()) {
		add_editor_plugin(memnew(AssetLibraryEditorPlugin));
	} else {
		print_verbose("Asset Library not available (due to using Web editor, or SSL support disabled).");
	}
	
	raise_bottom_panel_item(AnimationPlayerEditor::get_singleton());
	add_editor_plugin(VersionControlEditorPlugin::get_singleton());
	vcs_actions_menu = VersionControlEditorPlugin::get_singleton()->get_version_control_actions_panel();
	vcs_actions_menu->set_name("Version Control");
	vcs_actions_menu->connect("index_pressed", callable_mp(this, &EditorNode::_version_control_menu_option));
	vcs_actions_menu->add_item(TTR("Create Version Control Metadata..."), RUN_VCS_METADATA);
	vcs_actions_menu->add_item(TTR("Version Control Settings..."), RUN_VCS_SETTINGS);
	project_menu->add_child(vcs_actions_menu);