Socorro:Releases/1.7.7

• Theme: ship UI improvements for Platform
• bugs
• Freeze: 2/17???
• Ship: 2/24???
• These dates can be a week later
• Main features:
  • Explosive bug tracking (all)
  • Work on duplicate crashes (all)
  • Post migration tidying up (all)
  • Better safety for postcrashemail (rhelmer)