Starting in snapshot 19w11a, it's now possible to highlight GUI buttons and change their values using the keyboard. Though, when the Sensitivity slider is selected in Controls screen, it's possible to alter its values by clicking outside the slider (more specifically, by clicking the scrolling part of the screen, where the keybinds are defined). By clicking to the far left or right of the screen, it's possible to set it to the minimum and maximum values, respectively, without even touching the slider.

Such an abrupt change may be an unwanted effect, and may cause it to be changed accidentally, especially now that there's no way to un-highlight buttons once they're selected (except by selecting another one).

Steps to reproduce

1. Head over to the Controls screen.
2. Highlight the Sensitivity slider by clicking it or pressing Tab three times.
3. In the scrolling part, repeatedly click the far left or right of the screen, changing the mouse position a little bit each time (not all spots seem to work).
4. The slider will be set to yawn or HYPERSPEED!!!, respectively.