Interaction Graph insight bugfix
New insight: Long-lost contacts
Closes #1463, closes #1664
Response Time insight copy fixes
Closes #1670, closes #1700
New link list insight attachment template
Closes #1665, closes #1705
Get 12 followees replied to instead of just 5
Alter prefix for reply spike and word frequency insights
closes #1695, closes #1699
Fixes #1661 - Added hot_posts_data to Weekly Bests insight attachment