Resolves fdo#85750: Custom Animation timeing does not retain settings

Conflicts:
	sd/source/ui/animations/CustomAnimationPane.cxx

Reviewed-on: https://gerrit.libreoffice.org/12236
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 236819ecfa38360aa72d1061808b20204a0af594)

Conflicts:
	sd/source/ui/animations/CustomAnimationPane.cxx

Change-Id: Id6bbd113630348493ed1e67da72c7a42c5188b44
Reviewed-on: https://gerrit.libreoffice.org/12410
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>