Remove Workflow Manager timeout and bootout behavior

[jrobble]

We decided to remove the Workflow Manager timeout and bootout behavior to improve end user quality of life. Initially this task was created to address the issue below the line.

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I set the timeout system property to 2 minutes. After the first timeout I was able to login again from the timeout screen. I then let the UI timeout again. This time I did not log on at the timeout screen until about a half hour later. When I tried, I got a white screen with this black text:

Warning! There was a problem processing your request. More information is available in your web server's log

This message also appears when you log into the WFM using tab A, open tab B, go to the job status page in tab B (does not require a login), log out using tab B, then try to sign in using tab B.

All tests done in FireFox.

[jrobble]

UI no longer times out.