Print and PrintSegment are now infallible due to gwidth also being
infallible. The previous error was only error.OutOfMemory if a temporary
buffer was too small to encode text in gwidth. This has been removed in
favor or a for loop
Add a renderer for applications running on the primary screen. This
renderer uses relative cursor positioning, and works with all the same
primitives as the alternate screen.
Fix a bug where repositioning was never turned back to false. This was a
nasty one with huge perf implications.
Set internal cells to a space and default on init. This prevents us from
writing them. As a result, we now issue a hardware clear on resize.
