Always show cursor when DontBlinkCursor is true

[kiwiz]

Rather than updating the cursor after 250ms, I'd like for the option to immediately move the cursor on update (and not hide it). From a quick look at the code, it seems like I could just remove:

await Task.Delay(Settings.CursorBlinkInterval);
TerminalWindow.UnsetCursor(currentRow, currentCol);

in Program.cs. IMO, this would be nicer behaviour for DontBlinkCursor. Another option would be to add a flag for this new behaviour.

[i-am-shodan]

That function doesn't hold state of where the cursor was in the past. So if you remove that code the line drawn for the cursor will never be removed from screen.

There need to be a bit of code to track this and always unset it when a new update comes along.

And that code need to be thread safe