Seconds are not really seconds

[GoodKey]

The refresh rate is perhaps too low because seconds are very irregular. Sometimes they take a second, sometimes one and a half.

[floatas]

Refresh rate might not be consistent, because yapa uses timer and counts seconds one by one and delays are possible, we can refactor to calculate from pomodoro start time minus current time, but in this case pause button would be removed.

[floatas]

After deeper look, seconds are seconds. There might be delay in WPF, UI might be lagging a bit.