fix: equal-width action buttons

This was 1/3 because there used to be 3 buttons. Now the number of buttons is unknowable, so just let each button take up as much space as it needs.

Author: sqs

src/HoverOverlay.scss

@@ -67,7 +67,6 @@
     }
 
     &__action {
-        width: percentage(1/3);
         text-align: center;
         border: none;
     }