More idiomatic use of Razor in html button ids.
Update button styling, remove unnecessary javascript scripts, simplify favorite button HTML, added a 'you have no favorites' message for the manage favorites page. Fixed a bug where manage my favorites page shows 'old' favorites in the list. Added a couple misc unit tests.
Rename 'UserFollowsPackage' to 'PackageFollow' according to @anurse's suggestion.
Fix a bug in ColumnLengthOfPackageTable Down() migration found while doing some migration up/down testing.