The `metamaskNetworkId` property in the `txMeta` for incoming
transactions was incorrectly set as a Number instead of a String. This
change was made accidentally as part of #8627.
As a result incoming transactions were being excluded from the
transaction list, as they didn't have a matching network ID.
`metamaskNetworkId` is now set to a string, and a migration has been
added to ensure `metamaskNetworkId` is converted to a string for any
incoming transactions in state.
The `_fetchAll` function is expected to return values, so catching
errors and logging them only results in an additional error at the
place where `_fetchAll` is called. It's better instead to let the
error get thrown as normal.
In this particular case `_fetchAll` is only called in once place. The
error is still correctly caught and logged (in the `_update` function)
* Fix styling of `.transaction-list`
* Filter `incomingTxListSelector` by network as well
* Start and stop block tracker polling in incoming tx controller
* Add fetch with abort in bg for `IncomingTxController`
