webui: update combobox input on list click

Change event of combobox is not triggered when there is only one value. Calling it's handler even for option's 'click' event makes sure that value of input gets always updated.

https://fedorahosted.org/freeipa/ticket/4655

Reviewed-By: Endi Sukma Dewata <edewata@redhat.com>

install/ui/src/freeipa/widget.js

@@ -3826,10 +3826,13 @@ IPA.combobox_widget = function(spec) {
 
     that.list_on_change = function(e) {
 
+        var org_val = that.input.val();
         var value = that.list.val();
-        that.input.val(value);
-        that.value_changed.notify([[value]], that);
-        that.emit('value-change', { source: that, value: value });
+        if (org_val != value) {
+            that.input.val(value);
+            that.value_changed.notify([[value]], that);
+            that.emit('value-change', { source: that, value: value });
+        }
     };
 
     that.list_child_on_blur = function(e) {
@@ -3852,6 +3855,7 @@ IPA.combobox_widget = function(spec) {
         // Close list when user selects and option by click
         // doesn't work in IE, can be fixed by moving the handler to list.click,
         // but it breaks UI automation tests. #3014
+        that.list_on_change();
         that.close();
         IPA.select_range(that.input, 0, 0);
     };