Added "normal" font for HUD, reporting errors is now also static, displaying error message is now also done
intrduced new error: model update varaiance too high. Also made it only process one windows message at a time to prevent a large quantity causing inconsistant timing
reverting a part of last revision: update variance being too high is not a critical error at all -- the values on the screen are still valid at this point. Instead, I should probably show a "approx. accuracy" value on the HUD
Metrics calculations, recording, and error reporting