Jquery upgrade

The treeview in kmelia used the unmaintained plugin splitter.js. This plugin is based on the old Jquery API and uses the deprecated function browser to detect the type of the web browser. In order to use again this plugin until its replacement by an equivalent and maintained one, a reference to the plugin jquery-migrate is included in the JSP. This plugin provides the deprecated functions that were removed from the JQuery plugin since version 1.9 (like browser)

Don't forget to integrate also the branch jquery-upgrade in the project Silverpeas-Core