### 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
return tabs_visible;
}
void TabContainer::set_all_tabs_in_front(bool p_in_front) {
	if (p_in_front == all_tabs_in_front) {
		return;
	}
	all_tabs_in_front = p_in_front;
	remove_child(tab_bar);
	add_child(tab_bar, false, all_tabs_in_front ? INTERNAL_MODE_FRONT : INTERNAL_MODE_BACK);
}
bool TabContainer::is_all_tabs_in_front() const {
	return all_tabs_in_front;
}
void TabContainer::set_tab_title(int p_tab, const String &p_title) {