Admin UI: apply findings of Code Style review

https://issues.jboss.org/browse/AGPUSH-695
- In installation.html I see stuff like <col width="45%">. I think this
should be rewritten to use the bootstrap grid layout (classes like
col-md-12...).

https://issues.jboss.org/browse/AGPUSH-719
- rename newadminApp to upsConsole

https://issues.jboss.org/browse/AGPUSH-723
-  favour use of $location.absUrl() over $window.location