Fee rate not displayed when replacing transaction

[matejcik]

trafficstars

Describe the bug #1294 implements fee rate for "sign transaction" flow. Fee rate should probably be displayed on "modify fee" screen as well.

screenshots: https://satoshilabs.gitlab.io/-/trezor/trezor-firmware/-/jobs/2826526641/artifacts/test_ui_report/passed/TT_bitcoin-test_signtx_replacement.py::test_p2tr_fee_bump.html