When you select a facet, it instantly pops open again, obscuring the
results of the most recent facet. This is fixed.
To test: Go to Launch Instance / Source, then click in the Available
search bar. Add facets, and verify that after selecting each facet
opton that the facet drop-down is not shown.
Closes-bug: #1552594
Change-Id: Iffed933131163b6e64297ad8d7cd8912311c3ff0