Revert "changing dropdown triggers to be bound to parent with "data-toggle" attribute set to "dropdown" instead of  parents having class "dropdown-toggle" (which is not nessesary condition for dropdown declaration and is just used to style caret element if present)"

This reverts commit f91f8715624e003500a9ed559c030550d3fc36a1.
changing dropdown triggers to be bound to parent with "data-toggle" attribute set to "dropdown" instead of  parents having class "dropdown-toggle" (which is not nessesary condition for dropdown declaration and is just used to style caret element if present)