Fix dashboard nav, when panelgroup empty

The identity dashboard breaks with a common pattern
and doesn't use a panel group to group panels. When not
using accordion navigation, the last level of navigation is
not shown at all.

Change-Id: Ic76611009eac30658d0af082b0e46cd8f2da1832
Closes-Bug: #1391524
(cherry picked from commit 8e3950a19c244cbb253b34ef1cd46c86b952cc14)
Merge "Fix dashboard nav, when panelgroup empty" into stable/juno