### 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
Dictionary state;
	state["main_tab"] = _get_current_main_editor();
	state["scene_tree_offset"] = SceneTreeDock::get_singleton()->get_tree_editor()->get_scene_tree()->get_vscroll_bar()->get_value();
	state["property_edit_offset"] = InspectorDock::get_inspector_singleton()->get_scroll_offset();
	state["node_filter"] = SceneTreeDock::get_singleton()->get_filter();
	return state;
}
void EditorNode::_set_main_scene_state(Dictionary p_state, Node *p_for_scene) {
	if (get_edited_scene() != p_for_scene && p_for_scene != nullptr) {
		return; 
	}
	changing_scene = false;
	int current_tab = -1;
	for (int i = 0; i < editor_table.size(); i++) {
		if (editor_plugin_screen == editor_table[i]) {
			current_tab = i;
			break;
		}
	}
	if (p_state.has("editor_index")) {
		int index = p_state["editor_index"];
		if (current_tab < 2) { 
			if (index < 2 || !get_edited_scene()) {
				editor_select(index);
			}
		}