### 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
FILE_OPEN_PREV,
		FILE_CLOSE,
		FILE_CLOSE_OTHERS,
		FILE_CLOSE_RIGHT,
		FILE_CLOSE_ALL,
		FILE_QUIT,
		FILE_EXTERNAL_OPEN_SCENE,
		EDIT_UNDO,
		EDIT_REDO,
		EDIT_RELOAD_SAVED_SCENE,
		TOOLS_ORPHAN_RESOURCES,
		TOOLS_BUILD_PROFILE_MANAGER,
		TOOLS_SURFACE_UPGRADE,
		TOOLS_CUSTOM,
		RESOURCE_SAVE,
		RESOURCE_SAVE_AS,
		RUN_SETTINGS,
		RUN_USER_DATA_FOLDER,
		RELOAD_CURRENT_PROJECT,
		RUN_PROJECT_MANAGER,
		VCS_MENU,
		RUN_VCS_METADATA,
		RUN_VCS_SETTINGS,
		SETTINGS_UPDATE_CONTINUOUSLY,
		SETTINGS_UPDATE_WHEN_CHANGED,
		SETTINGS_UPDATE_ALWAYS,
		SETTINGS_UPDATE_CHANGES,
		SETTINGS_UPDATE_SPINNER_HIDE,
		SETTINGS_PREFERENCES,
		SETTINGS_LAYOUT_SAVE,