### 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
tab_bar->set_focus_mode(p_focus_mode);
}
Control::FocusMode TabContainer::get_tab_focus_mode() const {
	return tab_bar->get_focus_mode();
}
void TabContainer::set_clip_tabs(bool p_clip_tabs) {
	tab_bar->set_clip_tabs(p_clip_tabs);
}
bool TabContainer::get_clip_tabs() const {
	return tab_bar->get_clip_tabs();
}
void TabContainer::set_tabs_visible(bool p_visible) {
	if (p_visible == tabs_visible) {
		return;
	}
	tabs_visible = p_visible;
	tab_bar->set_visible(tabs_visible);
	Vector<Control *> controls = _get_tab_controls();
	for (int i = 0; i < controls.size(); i++) {
		Control *c = controls[i];
		if (tabs_visible) {
			c->set_offset(SIDE_TOP, _get_top_margin());
		} else {
			c->set_offset(SIDE_TOP, 0);
		}
	}
	queue_redraw();
	update_minimum_size();
}
bool TabContainer::are_tabs_visible() const {