Breeze Wallet Beta 0.2.1

This is a small beta release for the Breeze Wallet.
It fixes a bunch of issues, including (but not limited to):

• Mac OSX 10.12.6 error when clicking twice on tray icon
• Non-standard windows tray icon behavior
• Make text clearer in wallet recovery modal
• Sending small amounts without a leading zero should be allowed
• Set the same template for history transactions
• Remove space in successful sending message
• sharper icon on MacOS
• Formatting of error when importing the same wallet twice could be better
• Fix the success modal
• "Estimate Fee" button requires wallet password, but probably shouldn't
• Failing to send coins due to node issues does not provide an error message
• Nodes don't seem to discover each other
• Change "No spendable transactions found on account account 0"
• Last block received starts from 0 when app closed early