TT redesign: special screens for altcoins

[hynek-jina]

most altcoin functionality is covered by confirm_text / confirm_blob / confirm_properties.

However, there are several custom screens:

• confirm_total_ethereum -> should be converted to a sequence of "confirm fee" -> "confirm fee" -> "confirm total" or something along these lines
• confirm_total_ripple -> should be removed in favor of "confirm output" -> "confirm fee" -> "confirm total"
• confirm_transfer_binance -> should be converted to confirm_properties for inputs, confirm_output for outputs. Unfortunately there doesn't seem to be a sensible way to show total, so some sort of "really confirm? (hold)" with no further info is probably the way to go.
• confirm_decred_sstx_submission -> figure something out? probably a confirm_properties?

[grdddj]

Below are the custom screens in their current look.

To make sure, the goal here is to make it look exactly the same, or just "somehow make it work"?

[matejcik]

definitely not "exactly the same".

Instead, figure out how to display the same information in terms of the existing layout types -- or prove that it is not possible in some cases.

Especially in case of Ethereum, I believe the eip1559 variant already does something with confirm_fee / confirm_total, that same logic should also apply to the old signing method.

[grdddj]

Done in https://github.com/trezor/trezor-firmware/pull/2545