Show raw WPM & accuracy change per hour spent typing

[MoonlitMonitor]

Under the first graph on the account page, it shows you your "Speed change per hour spent typing".

It would also be interesting to display "Raw WPM change per hour spent typing" and "Accuracy change per hour spent typing" to see how much faster or slower you got in terms of raw input over time and to see how much more or less accurate you got over time.