[fix] Allow keyboard navigation for non-input fields
[fix] Allow keyboard navigation for non-input fields

fixes #874

vsn4ik/bootstrap-datepicker,CherryDT/bootstrap-datepicker,inspur-tobacco/bootstrap-datepicker,steffendietz/bootstrap-datepicker,eternicode/bootstrap-datepicker,acrobat/bootstrap-datepicker,Azaret/bootstrap-datepicker,Azaret/bootstrap-datepicker,uxsolutions/bootstrap-datepicker,inspur-tobacco/bootstrap-datepicker,vsn4ik/bootstrap-datepicker,wearespindle/datepicker-js,uxsolutions/bootstrap-datepicker,steffendietz/bootstrap-datepicker,CherryDT/bootstrap-datepicker,acrobat/bootstrap-datepicker,eternicode/bootstrap-datepicker