ISS Tracker v1.3.0

v1.3.0 — Display Update

This version switches the app over to sprite-based drawing.
The screen now updates as a single frame instead of redrawing line-by-line, which gets rid of the flicker that showed up on the LIVE screen and in the menus.

Changes:
Converted all screens to use an off-screen sprite buffer
LIVE updates are smoother and no longer flash
Text entry screens redraw cleanly
General UI feels more stable overall

Nothing else changed functionally, just a much cleaner display update method.