restore_input is called in State::rcv_event on arrival of a fork
finished event:
```
UIEvent::Fork(ForkType::Finished) => {
self.switch_to_main_screen();
self.switch_to_alternate_screen();
self.context.restore_input();
return;
}
```
So there shouldn't be an extra call here.
They are just typedefs for the Selector widget. The API is kind of
messed up and this commit is part of the process of cleaning it up:
right now to use this, you check the is_done() method which if returns
true, the done() method executes the closure you defined when creating
the widget. The closure returns a UIEvent which you can forward
application-wide by context.replies.push_back(event) or handle it in
process_event() immediately.
Merge ui crate with root crate.
In preparation for uploading `meli` as a separate crate on crates.io.
Workspace crates will need to be published as well and having a separate
`ui` crate and binary perhaps doesn't make sense anymore.