diff -r 19635af1ecec -r 882b5db98946 src/pyams_thesaurus/zmi/resources/js/pyams_thesaurus.js
--- a/src/pyams_thesaurus/zmi/resources/js/pyams_thesaurus.js	Fri Dec 28 10:13:41 2018 +0100
+++ b/src/pyams_thesaurus/zmi/resources/js/pyams_thesaurus.js	Fri Dec 28 10:18:44 2018 +0100
@@ -52,12 +52,12 @@
 								  .css('color', 'silver');
 						}
 					}
-					var span = $('<span></span>').addClass('label label-success')
+					var span = $('<span></span>').addClass('label')
 												 .addClass(node.css_class)
 												 .attr('data-ams-url', node.view)
 												 .attr('data-toggle', 'modal');
 					if (node.expand) {
-						$('<i></i>').addClass('fa fa-lg fa-plus-circle')
+						$('<i></i>').addClass('fa fa-fw fa-plus-circle')
 									.attr('data-ams-click-handler', 'PyAMS_thesaurus.tree.expand')
 									.attr('data-ams-stop-propagation', true)
 									.appendTo(span);