With the current implementation of MenuBarManager, there is
no need to have sdi slots for menu items with submenus, and
moreover they have no effect at all.

Note that SID_PICKLIST was also (mis)used as an argument
to avoid adding a document to the recent list (which isn't
related to its mapping to .uno:PickList). But there seem to
be only read attempts, nothing actually sets it, so I think
this usage can be removed too. (For information, at least in
OOo 1.0.3 sources, there were 2 places where it was used as
an argument for SID_SAVEASDOC, although it was not present
there in the SID_SAVEASDOC def. in sfx.sdi.)

Change-Id: I18b0afe106f858406e13188bbc004ac99a3a0246
Reviewed-on: https://gerrit.libreoffice.org/43184Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Maxim Monastirsky <momonasmon@gmail.com>