Added support for dynamic mail labels/tags management.

The CSS in the UIxPreferences remains to be done.

UI/WebServerResources/UIxColorPicker.js

@@ -1,11 +1,13 @@
 /* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 
+var type;
+
 function onLoadColorPicker(event) {
   showColorPicker();
 }
 
 function onChooseColor(newColor) {
-  window.opener.onColorPickerChoice(newColor);
+  window.opener.onColorPickerChoice(newColor, type);
   window.close();
 }