This option must have the same value as --with-system-libxml, so it is
redundant.

* initialze with_system variables in AC_ARG_WITH
* do not interpret --without-system-libs as --with-system-libs

to allow for platform dependent defaults.

improves MatchByUpperName tests avoiding type conversions

drop un-necessary uno service related fluff, and component instantiation.
nominal move to XMultiComponentFactory from XMultiServiceFactory
Include fpicker in compilation for gtk3, but more work required here
Simplify setting up transient parents for picker dialogs