### 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
EditorPlugin::AfterGUIInput after = EditorPlugin::AFTER_GUI_INPUT_PASS;
	for (int i = 0; i < plugins_list.size(); i++) {
		if ((!serve_when_force_input_enabled) && plugins_list[i]->is_input_event_forwarding_always_enabled()) {
			continue;
		}
		EditorPlugin::AfterGUIInput current_after = plugins_list[i]->forward_3d_gui_input(p_camera, p_event);
		if (current_after == EditorPlugin::AFTER_GUI_INPUT_STOP) {
			after = EditorPlugin::AFTER_GUI_INPUT_STOP;
		}
		if (after != EditorPlugin::AFTER_GUI_INPUT_STOP && current_after == EditorPlugin::AFTER_GUI_INPUT_CUSTOM) {
			after = EditorPlugin::AFTER_GUI_INPUT_CUSTOM;
		}
	}
	return after;
}
void EditorPluginList::forward_canvas_draw_over_viewport(Control *p_overlay) {
	for (int i = 0; i < plugins_list.size(); i++) {
		plugins_list[i]->forward_canvas_draw_over_viewport(p_overlay);
	}
}
void EditorPluginList::forward_canvas_force_draw_over_viewport(Control *p_overlay) {
	for (int i = 0; i < plugins_list.size(); i++) {
		plugins_list[i]->forward_canvas_force_draw_over_viewport(p_overlay);
	}
}
void EditorPluginList::forward_3d_draw_over_viewport(Control *p_overlay) {