SAK-26025 - do not grey out menu items of resource items that are hidden

git-svn-id: https://source.sakaiproject.org/svn/content/trunk@307962 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-26028 - make navigator control panel static, and scroll resource list only

git-svn-id: https://source.sakaiproject.org/svn/content/trunk@307963 66ffb92e-73f9-0310-93c1-f5514f145a0a