Scheduler does not save jobs status properly

The way the scheduler saves job status is wrong, and used to work only because of a bug in XWiki core that has been fixed in 2.5 M1 :

    private void saveStatus(String status, BaseObject object, XWikiContext context) throws XWikiException
    {
        XWikiDocument jobHolder = context.getWiki().getDocument(object.getName(), context);
        object.setStringValue("status", status);
        jobHolder.setMinorEdit(true);
        context.getWiki().saveDocument(jobHolder, context);
    }

When using scheduler plugin with a core version > 2.5 the symptoms are :

• Job states are not saved, so not restored properly after a server restart. For example a paused job will restart in its state before it was pause.
• Newly created jobs (for example watchlist jobs when creating a new wiki) will always have "None" as status in the UI, and their next fire time will be displayed as N/A (although the job is actually really scheduled against quartz).