Change undo to regular button

https://fedorahosted.org/freeipa/ticket/3904

install/ui/src/freeipa/widget.js

@@ -316,13 +316,12 @@ IPA.input_widget = function(spec) {
     that.create_undo = function(container, on_undo) {
         container.append(' ');
 
-        that.undo_span =
-            $('<span/>', {
-                name: 'undo',
-                style: 'display: none;',
-                'class': 'ui-state-highlight ui-corner-all undo',
-                html: text.get('@i18n:widget.undo')
-            }).appendTo(container);
+        that.undo_span = IPA.button({
+            name: 'undo',
+            style: 'display: none;',
+            'class': 'undo',
+            label: text.get('@i18n:widget.undo')
+        }).appendTo(container);
 
         if(on_undo === undefined) {
             on_undo = function() {

ipatests/test_webui/ui_driver.py

@@ -825,7 +825,7 @@ class UI_driver(object):
         """
         if not parent:
             parent = self.get_form()
-        s = "div[name='%s'].field span.undo" % (field)
+        s = ".controls div[name='%s'] .btn.undo" % (field)
         undos = self.find(s, By.CSS_SELECTOR, parent, strict=True, many=True)
         return undos