### 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
SETTINGS_LAYOUT_DELETE,
		SETTINGS_LAYOUT_DEFAULT,
		SETTINGS_EDITOR_DATA_FOLDER,
		SETTINGS_EDITOR_CONFIG_FOLDER,
		SETTINGS_MANAGE_EXPORT_TEMPLATES,
		SETTINGS_MANAGE_FBX_IMPORTER,
		SETTINGS_MANAGE_FEATURE_PROFILES,
		SETTINGS_INSTALL_ANDROID_BUILD_TEMPLATE,
		SETTINGS_PICK_MAIN_SCENE,
		SETTINGS_TOGGLE_FULLSCREEN,
		SETTINGS_HELP,
		SCENE_TAB_CLOSE,
		EDITOR_SCREENSHOT,
		EDITOR_OPEN_SCREENSHOT,
		HELP_SEARCH,
		HELP_COMMAND_PALETTE,
		HELP_DOCS,
		HELP_QA,
		HELP_REPORT_A_BUG,
		HELP_COPY_SYSTEM_INFO,
		HELP_SUGGEST_A_FEATURE,
		HELP_SEND_DOCS_FEEDBACK,
		HELP_COMMUNITY,
		HELP_ABOUT,
		HELP_SUPPORT_GODOT_DEVELOPMENT,
		SET_RENDERER_NAME_SAVE_AND_RESTART,
		IMPORT_PLUGIN_BASE = 100,
		TOOL_MENU_BASE = 1000
	};
	enum {