fdo#81547: prevent crash by reading relevant .ui file

instead of no longer existing resource.

Additionally, tweak widget visibility so that only relevant widgets
are shown in Data series properties -> Layout tab. This is achieved
by setting initial status of most of the widgets in .ui file to hidden,
as *ResourceGroup::showControls() methods will take care of showing
them when appropriate

Change-Id: Iacbc689fb410b30515e433bcf4a96c087047ca73
Reviewed-on: https://gerrit.libreoffice.org/10496
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>