Copy datetimepicker.xml from Mozilla core source tree
Copy datetimepicker.xml from Mozilla core source tree

This is toolkit/content/widgets/datetimepicker.xml from the Mozilla
core source tree as of 344698:6055065a2ed5, dated February 20, 2017,
unmodified. I am copying it in preparation for fixing bugs in it that
the Mozilla folks have not gotten around to fixing.

jikamens/send-later,jikamens/send-later,jikamens/send-later,jikamens/send-later