When exists 2 or more views and one of the views open the ScFilter dialog,
the other views are locked and no event process.

In tiled rendering case, collaborative editing is not functional with 2 or
more views are locked, so the patch prevents locking the other views

Change-Id: I0133d38ac5ecef4d3ebc22f3e922602704dcd0b3
Reviewed-on: https://gerrit.libreoffice.org/51370Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Henry Castro <hcastro@collabora.com>
(cherry picked from commit 009d2756)