Added a link to add a new category when creating or editing an issue.

The user is prompted for the category name. The new category is created and the drop-down list updated using an ajax call.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@648 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/javascripts/application.js

@@ -41,6 +41,14 @@ function setPredecessorFieldsVisibility() {
     }
 }
 
+function promptToRemote(text, param, url) {
+    value = prompt(text + ':');
+    if (value) {
+        new Ajax.Request(url + '?' + param + '=' + value, {asynchronous:true, evalScripts:true});
+        return false;
+    }
+}
+
 /* shows and hides ajax indicator */
 Ajax.Responders.register({
     onCreate: function(){