fix(dropdown): fix hide method to check if dropdown is open first
fix(datepicker): fix hide method to check if datepicker is open first
fix(timepicker): fix hide method to check if timepicker is open first
test(bsShow): add bsShow attribute tests
test(bsShow): add tests for bsShow attribute with string values
fix(bsShow): fix bsShow to support using "true" string to show element