The scenario is like this (see the unit test):

* double-click a word to select it (the handles appear)
* click somewhere else (the selection and handles disappear)
* double-click the same word again (the handles did not appear in this
  case)

The reason was that the old state was remembered and the now thought
duplicate state was discarded.

Change-Id: Ia49200f12907c520067258b7570d4e21b365a8dd
Reviewed-on: https://gerrit.libreoffice.org/66171
Tested-by: Jenkins
Reviewed-by: Jan Holesovsky <kendy@collabora.com>