HdyDialog buttons are always tall on the lockscreen
It's currently not possible to get the HdyDialog buttons to be square on the lockscreen. Changing min-width, padding, etc. makes them bigger, but the aspect ratio always remains tall. This does not happen in the Hdy demo.
@adrien.plazas thinks it might be due to the buttons at the bottom being hidden and the remaining buttons trying to fill the same amount of space.