fix menu position inside a container (that scrolls and/or has different dimensions than body) fix #1422
fix menu position inside a container (that scrolls and/or has different dimensions than body)
fix #1422

anhtranqs3/bootstrap4-select,jesenko/bootstrap-select,jesenko/bootstrap-select,anhtranqs3/bootstrap4-select,silviomoreto/bootstrap-select,silviomoreto/bootstrap-select