Next/Previous Key Frame hotkey and buttons are no longer working in the Curves view. Working fine in the Dopesheet.

repro:
Create a Cube
Create a clip in the Animation window
Create a few keys
In the Dopesheet, use Alt + < > OR buttons, to navigate between keys... works fine.
In the Curves, use Alt + < > OR buttons, to navigate between keys... doesn't work.
note: < > works for moving frame-by-frame, but Alt + < > doesn't

This is a regression.
Works in 5.2.3p2
Does not work in 5.3 and 5.4