Slight improvement to Customize More noscript behavior

My wife suggested this, thanks Aria!! Identical behavior, but not using
the hack of reading the `style` attribute.

app/assets/stylesheets/items/_show.sass

@@ -66,6 +66,7 @@ body.items-show
         overflow: hidden
         transition: width .25s
         white-space: nowrap
+        --natural-width: auto
 
         measured-content
           padding-right: .5em
@@ -75,8 +76,6 @@ body.items-show
         // what it is in px, we can use that for a smooth transition. If not,
         // okay, we just pop out to `auto`, which CSS can't make smooth.
         .customize-more-label
-          width: auto
-          &[style*="--natural-width"]
           width: var(--natural-width)
 
   outfit-viewer