userportal,webadmin: Custom dropdown chrome

- The height in the custom drop downs in chrome
  was too small, this patches fixes that issue

Change-Id: I71b3cf9ef250647c18e08cccc8c83c21f7474477
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1173660
Signed-off-by: Alexander Wels <awels@redhat.com>