Add styling for user merging tool. refs #1524

@@ -791,4 +791,10 @@ a.remove-option-group, a.remove-option {
 #sortable ul { margin-left: 20px; list-style: none; }
 #sortable li { padding: 2px 0px; margin: 4px 0px; border: 1px solid #DDDDDD; cursor: move; -moz-border-radius: 6px }
 #sortable li span { display: block; background: #f7f7f7; padding: 5px; color: #808080; font-size: 14px; font-weight: bold; }
-#sortable li.placeholder { border: dashed 2px #ccc; background-color: #FFF; height: 20px; }
\ No newline at end of file
+#sortable li.placeholder { border: dashed 2px #ccc; background-color: #FFF; height: 20px; }
+
+.diff-accept { background-color: #0d0; }
+.diff-reject { background-color: #c36a5f; }
+.arrow-left { width: 16px; height: 20px; background: url(../../../../tz-tools/com/Branding/cpt-icons/arrow-180-medium.png); }
+.arrow-right { width: 16px; height: 20px; background: url(../../../../tz-tools/com/Branding/cpt-icons/arrow-000-medium.png); }
+.arrow-link { width: 16px; height: 20px; display: block; }