fix-tree-item-dragging

scene/gui/tree.cpp

@@ -3106,7 +3106,7 @@ void Tree::_gui_input(Ref<InputEvent> p_event) {
 					drag_accum = 0;
 					//last_drag_accum=0;
 					drag_from = v_scroll->get_value();
-					drag_touching = !DisplayServer::get_singleton()->screen_is_touchscreen(DisplayServer::get_singleton()->window_get_current_screen(get_viewport()->get_window_id()));
+					drag_touching = DisplayServer::get_singleton()->screen_is_touchscreen(DisplayServer::get_singleton()->window_get_current_screen(get_viewport()->get_window_id()));
 					drag_touching_deaccel = false;
 					if (drag_touching) {
 						set_physics_process_internal(true);