fixed alternative amount in TXP view
compute alternative currency for pending txps
show alternative amount on txps
cleanup unused method for alt currency conversion
rate service + tests
added rate services to wallet
fixed whenAvailable()
removed layout for small devices
replaced old rate service as angular controller
removed from wallet model
Merge pull request #1730 from isocolsky/history

Refactor rate service as model
Refresh list of pending transactions proposals after any events