We use the FloatingWindow base class also for some windows that are not
independent. A good example is the hyperlink dialog.

Change-Id: I067ac0465de9ff3c8f9bc0c1a5c817a5e09d96e5
Reviewed-on: https://gerrit.libreoffice.org/40650Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>