The DoubleClickHdl()'s return value does not mean "was handled", but actually
"is there anything more to be done".

Change-Id: Ideeee31db648829546a713148124e3d366941b9a
Reviewed-on: https://gerrit.libreoffice.org/52292Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan Holesovsky <kendy@collabora.com>
(cherry picked from commit 3af6be55)
Reviewed-on: https://gerrit.libreoffice.org/52305Reviewed-by: Marco Cecchetti <mrcekets@gmail.com>
Tested-by: Marco Cecchetti <mrcekets@gmail.com>