VID-1464 adding clicksource tracking for latest videos module
VID-1464 using const instead of string
Merge branch 'VideoSprint43' into VID-1464

Conflicts:
	extensions/wikia/Lightbox/js/LightboxLoader.js
Merge pull request #3082 from Wikia/VID-1464

VID-1464 adding clicksource tracking for latest videos module