webadmin: improve behavior of bookmark list (1/2)

This patch series fixes some problems with the behavior of the bookmark
list.  This patch fixes:

 - bookmarks would stay selected after navigating elsewhere in the UI
 - a selected bookmark would be de-selected when the list was updated

Selections will now remain active until navigation or a search is
performed.

Change-Id: I21e0f807f5855f17d3549468a6ccf182156f12bb
Bug-Url: https://bugzilla.redhat.com/880499
Signed-off-by: Greg Padgett <gpadgett@redhat.com>