Add user message when authenticated users switch nodes

[murphysj]

WHO: Sylvia

Fei had an issue where he was editing a page on one node and then went to edit a page on a different node. This process dumped him to a login screen. He did not realize that each node requires its own login.

This may not be possible, but some sort of "your leaving this node" message might be helpful.

[murphysj]

Created javascript function to do this. Added that function as an onclick to the project browser links.

downside is you can't style JS alert boxes.

We can create our own using jquery but that adds more complexity.

Also, would we really want this EVERY time? Perhaps we can make it once per session.

[murphysj]

C would like session expiration. Will need to try to do our own alert in order to do that.

[murphysj]

Had to rewrite the session code. It works now....tested on cu dev.