### 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
open_imported->hide();
	load_scene(open_import_request, true, true);
}
void EditorNode::_open_imported() {
	load_scene(open_import_request, true, false, true, true);
}
void EditorNode::dim_editor(bool p_dimming) {
	dimmed = p_dimming;
	gui_base->set_modulate(p_dimming ? Color(0.5, 0.5, 0.5) : Color(1, 1, 1));
}
bool EditorNode::is_editor_dimmed() const {
	return dimmed;
}
void EditorNode::open_export_template_manager() {
	export_template_manager->popup_manager();
}
void EditorNode::add_resource_conversion_plugin(const Ref<EditorResourceConversionPlugin> &p_plugin) {