### 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
drag_to_rearrange_enabled = p_enabled;
}
bool TabContainer::get_drag_to_rearrange_enabled() const {
	return drag_to_rearrange_enabled;
}
void TabContainer::set_tabs_rearrange_group(int p_group_id) {
	tab_bar->set_tabs_rearrange_group(p_group_id);
}
int TabContainer::get_tabs_rearrange_group() const {
	return tab_bar->get_tabs_rearrange_group();
}
void TabContainer::set_use_hidden_tabs_for_min_size(bool p_use_hidden_tabs) {
	if (use_hidden_tabs_for_min_size == p_use_hidden_tabs) {
		return;
	}
	use_hidden_tabs_for_min_size = p_use_hidden_tabs;
	update_minimum_size();
}
bool TabContainer::get_use_hidden_tabs_for_min_size() const {
	return use_hidden_tabs_for_min_size;
}
Vector<int> TabContainer::get_allowed_size_flags_horizontal() const {
	return Vector<int>();
}
Vector<int> TabContainer::get_allowed_size_flags_vertical() const {