This "console" implementation has multiple issues, making it unusable in practice:
- saves and displays only few lines, cannot scroll back;
while multiple game messages may be printed per a single game frame;
- messages cannot be filtered at runtime;
- uses a game font of a fixed number, which in unreliable (as the font may not be suitable);
There's not much value in its code; if a new console will be wanted in the future, then it
would be best to reimplement one from scratch, but with a good planning first.
From upstream c303590efca4632fef0fb2ab3143faba6e605ba8
