_header.scss in uswds-rails-1.4.4

- old
+ new

@@ -100,10 +100,10 @@
 
 .usa-overlay {
   @include position(fixed, 0);
   background: $color-black;
   opacity: 0;
-  transition: all 0.2s ease-in-out;
+  transition: opacity 0.2s ease-in-out;
   visibility: hidden;
   z-index: $z-index-overlay;
 
   &.is-visible {
     opacity: 0.1;