LP#1642378 Webstaff Negative Balance org select repairs

LP#1642378 Webstaff Negative Balance org select repairs

1. Disable org units in the org unit selector that cannot have users.

Additional code cleanup:

2. The org selector calls egStartup internally, so if the page
controller has no need to wait on the startup to complete, then it does
not need to manually invoke the startup.

3. No longer necessary to manually track the selected org unit from the
org selector directive.

Signed-off-by: Bill Erickson <berickxx@gmail.com>