update jquery.colorbox to version 1.4.3

Updated Colorbox to include version 1.4.3 from jackmoore/colorbox@4e3183526ae2b9a69e25fa73bc64d83ef555a0e1.

Main scripts:
https://github.com/jackmoore/colorbox/blob/1.4.3/jquery.colorbox-min.js
https://github.com/jackmoore/colorbox/blob/1.4.3/jquery.colorbox.js

There are many additional files for the 5 included themes, same as for 1.3.27.