Add select_config task to Rake

rake select_config set up to copy .yml config file
from lib/config/alt/
to lib/config/default_options.yml
Update compatibility & version for M2-r13146
Set target env -> dev.ole.kuali.org
Add staff upload page

Staff upload page is grouped under OLELS namespace,
but opens from OLEFS Main Menu.
(This will probably become irrelevant after unification.)
Add functions & elements to Staff Upload

- Add message element.
- Add upload function.