Reality Check: "too slow and too fast" with an average factor of 1.00

[dneuge]

Reality Check (dev version) sometimes reports fluctuations which average to normal 1.00, for example: "GSx 0.53/1.00/1.32 W0 C3 (too slow and too fast)"

This probably is some kind of measurement error (timing of plugin/LUA callbacks?). If possible, those measurements should be ignored and the warning should not be displayed while the average GS factor is within just a few percent around 1.00 and no other warning criteria are active.