[xwiki-devs] upgrade to gwt 1.4

Hi all, we want to upgrade XWiki Web gwt to gwt 1.4 for the 1.3 version so, since gwttk does not have a version for gwt 1.4 and we depend on it for creating modal dialogs, we need to replace tk with something else. A good option is gwt-ext, which also can replace gwt-widgets and provides some more nice ui objects and client functionality (like date parsing -- which we get from gwt-widgets for the moment). The trouble with gwt-ext is that it requires ext javascript library to run, which means that any gwt application needs to import, besides the gwt.js file, some ext javascript files. Since the modal dialogs are defined in the web-gwt module (so our gwt-ext dependency is there) and we cannot import the ext javascript files at that level, the only solution is to rely on the application using web-gwt to include right all required files. It doesn't seem to me as good practice but I cannot figure out how big of an issue it is (since that application already has some rules to obey, js files to include, etc to have gwt working). WDYT?