Lightbox: Removed aria-haspopup and optimized loader.
Merge pull request #2487 from pjackson28/removelightboxhaspopup

Lightbox: Removed aria-haspopup and optimized loader
Resolved merge conflicts.
Lightbox: Corrected title object assignment and changed pe to _pe.
Resolved merge conflicts.
Changed dataTitle to title in title object assignment.
Merge branch 'v3.0'