### 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
class CenterContainer;
class CheckBox;
class ColorPicker;
class ConfirmationDialog;
class Control;
class FileDialog;
class HBoxContainer;
class HSplitContainer;
class LinkButton;
class MenuBar;
class MenuButton;
class Node2D;
class OptionButton;
class Panel;
class PanelContainer;
class PopupPanel;
class RichTextLabel;
class SubViewport;
class TabBar;
class TabContainer;
class TextureRect;
class TextureProgressBar;
class Tree;
class VBoxContainer;
class VSplitContainer;
class Window;
class AudioStreamImportSettings;
class AudioStreamPreviewGenerator;
class BackgroundProgress;