Adding a number of logging messages for verification process.
Track upsell copy interaction, upgrade button and verify now button clicks on the dashboard
Update virtual pageview event categories, general polish
ECOM-759  if course is none return 404 error code.
Merge pull request #6326 from edx/renzo/split-verification-dashboard-analytics

Split verification dashboard analytics
Merge pull request #6323 from edx/awais786/ECOM-759

ECOM-759  if course is none return 404 error code.
Merge pull request #6327 from edx/sanchez/logging-verified-split

Adding a number of logging messages for verification process.