Add a comment explaining this css.

frontends/etiquette_flask/templates/album.html

@@ -29,6 +29,9 @@ h2, h3
 
 #right > *
 {
+    /* Fixes button_with_confirm, spinner, etc. from width-jumping on load,
+    because originally the button is occupying the full width and then becomes
+    small when it gets put into the holder */
     margin-right: auto;
 }
 #right input