- UI layouts name changes:
- model_tt -> layout_bolt
- model_tr -> layout_samson
- model_mercury -> layout_quicksilver
- rust features `model_xyz` freed for different use, now it's
`layout_xyz`
- input_flow function names are based on UI layout and not internal
model name (i.e. quicksilver instead of t3t1)
- directory names and commentary changed accordingly
[no changelog]
This commit replaces request_passphrase with flow_request_passphrase.
The added benefit is that the user is prompted for confirmation if they
want to proceed with an empty passphrase.
