Changes Panel: The left and right arrow buttons in the View All Changes window don't show a hand cursor when hovered over

[zhichli]

Testing #309111
The left and right arrow buttons in the View All Changes window don't show a hand cursor when hovered over.

[lostintangent]

@jo-oikawa I wonder if it's worth doing a pass on cursors all up just to make sure we don't have other cases like this?