Steam Controller Configuration button does not work in Options > Keybindings - v1.3

The Steam Controller Configuration button in Options > Keybindings does not work in v1.3.

I reverted to v1.2.1.6 and confirmed it still works there.

In v1.2.1.6, hovering over the button also showed a tooltip.
In v1.3, no tooltip appears at all.

Expected:
Opens the Steam Controller Configuration window.

Actual:
Nothing happens when clicked.