Backend: Improved "copy button" style in legacy admin theme (#4072)

Author: ma4nn

skin/adminhtml/default/default/boxes.css

@@ -232,7 +232,7 @@ tr.dynamic-grid input.input-text { width:154px; }
     margin: 2px 0 0 2px;
 }
 
-.entry-edit-head .icon-copy { width: 16px; height: 16px; margin: 8px 0 0 5px; }
+.entry-edit-head .icon-copy { width: 11px; height: 11px; margin: 0 0 0 5px; filter: hue-rotate(0) brightness(0) contrast(1) saturate(0) invert(1); }
 
 .icon-copy-copied { background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 30 30"><path d="M26.98 5.99a1 1 0 0 0-.687.303L11 21.586l-6.293-6.293a1 1 0 1 0-1.414 1.414l7 7a1 1 0 0 0 1.414 0l16-16a1 1 0 0 0-.727-1.717z"/></svg>'); }
 

skin/adminhtml/default/openmage/override.css

@@ -186,6 +186,13 @@ small {
     a {
       @extend %extend_10;
     }
+
+    .icon-copy {
+      width: 16px;
+      height: 16px;
+      margin: 8px 0 0 5px;
+      filter: revert;
+    }
   }
 
   fieldset {