issue 2928: Bastion: fix org selector on nutupane

This commit is to fix the org selector so that when a user clicks
on a new org, they are placed in that org and redirected to the
Dashboard.  The behavior is intended to be consistent with the
legacy tupane.
Merge pull request #2932 from bbuckingham/issue-2928

issue 2928: Bastion: fix org selector on nutupane