Don't redirect when clicking instance detail page in admin panel.

Fixes bug 1096299.

Currently, when you click the instance detail information page
in admin panel, horzion will redirects to the project panel.
This is not reasonable. This patch fixes this problem by staying
on the admin panel when clicking the instance detail page.

Change-Id: Id589ab7de5d5c3c70831538268139b5286bd61bd
Merge "Don't redirect when clicking instance detail page in admin panel."