### 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 FileSystemDock;
class HistoryDock;
class ImportDock;
class NodeDock;
class OrphanResourcesDialog;
class PluginConfigDialog;
class ProgressDialog;
class ProjectExportDialog;
class ProjectSettingsEditor;
class RunSettingsDialog;
class SceneImportSettings;
class ScriptCreateDialog;
class SurfaceUpgradeTool;
class SurfaceUpgradeDialog;
class WindowWrapper;
class EditorNode : public Node {
	GDCLASS(EditorNode, Node);
public:
	enum DockSlot {
		DOCK_SLOT_LEFT_UL,
		DOCK_SLOT_LEFT_BL,
		DOCK_SLOT_LEFT_UR,
		DOCK_SLOT_LEFT_BR,
		DOCK_SLOT_RIGHT_UL,
		DOCK_SLOT_RIGHT_BL,
		DOCK_SLOT_RIGHT_UR,
		DOCK_SLOT_RIGHT_BR,
		DOCK_SLOT_MAX
	};
	enum EditorTable {