<RecentTransaction /> time is based on side chain block number

[TimDaub]

Scope

• <RecentTransactions /> is used to display the user's transaction history
• The block_number a transaction as included in, is used to determine the time when a user made a transaction
• Currently only side chain transactions are listed in the burner-wallets history even though also mainnet transactions are executable
• When recording a mainnet transaction with a mainnet block_number, naturally the time estimate is off significantly

Deliverables

• Fix time estimates by e.g. not making them dependent on the side chain's block numbers
• Use a library like moment.js to make proper "time-ago" estimations that are not only in seconds but also in minutes, days and weeks. Make sure to make useful time estimates. E.g. "2.2m ago" is not useful!
• Display transaction date in History.js too

Roles

bounty gardener: @TimDaub / 10%
bounty worker: name / 75%
bounty reviewer: name / 15%