Apply ruff's safe autofixes.
The changes are mechanical and behaviour-preserving. Issues fixed:
- F401: remove unused imports.
- F841: drop unused local variables and assignments, including discarded
await/return values, unused "except ... as e" bindings, and unused
"with ... as name" targets.
- F541: remove the f prefix from f-strings that contain no placeholders.
- E711: compare against None with "is"/"is not" instead of "=="/"!=".
- E712: test truthiness directly instead of comparing to True.
- E713: use "x not in y" instead of "not x in y".
- E714: use "is not" instead of "not ... is".
- E731: convert lambdas bound to a name into def statements.
- W291/W293: trim trailing whitespace on touched lines.
Ensure all input order is preserved as it is processed.
Institute a 10ms delay after a key transmit. This is to prevent overwhelming QEMU console, and improve it for other consoles.
Tested by pasting a large volume of text and seeing that it was intact.
Replace input handling with an async, this
permitts screen updates while doing commands.
Implement 'send break' (sysrq) and focus move.
Indicate not-yet-active focus with titlebar color.
Markus Hilger
Jarrod Johnson