Add wbr style for IE 11

lib/tpl/dokuwiki/css/basic.less

@@ -312,6 +312,10 @@ small {
     font-size: .8em;
 }
 
+wbr {
+    display: inline-block; /* for IE 11 */
+}
+
 /*____________ forms ____________*/
 
 /* for all of the form styles, style.ini colours are not used on purpose (except for fieldset border) */