Better Feedback for submitted transactions

[apestakeui]

Currently, the app relies on the wallet provider to give feedback to the user on transaction executions (i.e., pending, success, failure).

Adding support to see the status of a submitted transaction in the app to:

• show pending status while waiting for wallet signature or pending in the mempool
• show failure status when rejected by wallet (currently reports back as an error)
• show failure status when contract reverts in gas estimation (currently reports back as an error)
• show success status when transaction is confirmed in new block