This reverts commit 466ece4588, which has
the message:
"Revert "Merge pull request #7599 from MetaMask/Version-v7.7.0" (#7648)"
This effectively re-introduces the changes from the "LoginPerSite" PR.
* tests - create tests for pending middlewares
* transactions - add r,s,v values to the txMeta to match the JSON rpc response
* network - add new middleware for eth_getTransactionByHash that the checks pending tx's for a response value
* transactions/pending - use getTransactionReceipt for checking if tx is in a block
* meta - file rename