### 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
if (!drag_to_rearrange_enabled) {
		return false;
	}
	return tab_bar->_handle_can_drop_data("tab_container_tab", p_point, p_data);
}
void TabContainer::_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from_control) {
	if (!drag_to_rearrange_enabled) {
		return;
	}
	return tab_bar->_handle_drop_data("tab_container_tab", p_point, p_data, callable_mp(this, &TabContainer::_drag_move_tab), callable_mp(this, &TabContainer::_drag_move_tab_from));
}
void TabContainer::_drag_move_tab(int p_from_index, int p_to_index) {
	move_child(get_tab_control(p_from_index), get_tab_control(p_to_index)->get_index(false));
}
void TabContainer::_drag_move_tab_from(TabBar *p_from_tabbar, int p_from_index, int p_to_index) {
	Node *parent = p_from_tabbar->get_parent();
	if (!parent) {
		return;
	}
	TabContainer *from_tab_container = Object::cast_to<TabContainer>(parent);
	if (!from_tab_container) {
		return;
	}
	move_tab_from_tab_container(from_tab_container, p_from_index, p_to_index);
}
void TabContainer::move_tab_from_tab_container(TabContainer *p_from, int p_from_index, int p_to_index) {