shrink label letter-spacing

app/assets/stylesheets/zammad.css.scss

@@ -779,7 +779,7 @@ label,
   display: block;
   font-size: 12px;
   font-weight: normal;
-  letter-spacing: 0.1em;
+  letter-spacing: 0.05em;
   margin-bottom: 4px;
   text-align: left;
   padding: 0;