userportal,webadmin: label value title

- Moved the title code from TextBoxLabel to
  TextBoxLabelBase so that all subclasses
  also set the title properly when setting the
  value.

Change-Id: I3cb524ba13ec9a9f37d5ddcb6b4554293d6ec23d
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1061379
Signed-off-by: Alexander Wels <awels@redhat.com>