lv_obj: lv_obj_set_parent: bugfix, send CHILD_CHG signal to the old parent too
lv_obj: lv_obj_set_parent: bugfix, send CHILD_CHG signal to the old parent too

littlevgl/lvgl,ajaybhargav/lvgl,littlevgl/lvgl,ajaybhargav/lvgl,littlevgl/lvgl,littlevgl/lvgl