Added issuer to the transaction history grid
Added transaction issuer address to user wallet contacts
Changed grid layout
Added cell classes
Removed issuer when currency is STR
Made column type to be responsive to viewport width
If the mainData gets corrupted, reset it
Back to the original layout and added issuer down the transaction amount
Merge pull request #578 from stellar/reset-corrupt-main-data

If the mainData gets corrupted, reset it
Merge pull request #575 from guillelopez/add-issuer-on-transactions-grid

Added issuer to the transaction history grid
Temporarily disable wallet syncs for contact ops
Store contacts in memory not in wallet.mainData
Remove the contact list from existing wallets
Remove stellar_contact in favor of fairy API