clean up linter errors/warnings
mixed use of context and window in tracker, just uses window explicitly now
added tracking to the tabbed file pages
added convention changes from code review, and updated tracker stub to remove confusing use of context && window
use cached variable
update based on kflo code rev
update filepagetabbed to use both wiki level and global level click tracking
declare variable before using
Merge pull request #1201 from Wikia/VideoSprint29-VID601-add-tracking-to-file-page

Video sprint29 vid601 add tracking to file page