Fix closing of library not handling backup and autosave manager shutdown (#4794)
Fix closing of library not handling backup and autosave manager shutdown (#4794)


sauliusg/jabref,zellerdev/jabref,sauliusg/jabref,JabRef/jabref,zellerdev/jabref,Siedlerchr/jabref,JabRef/jabref,zellerdev/jabref,Siedlerchr/jabref,Siedlerchr/jabref,sauliusg/jabref,JabRef/jabref,sauliusg/jabref,zellerdev/jabref,zellerdev/jabref,JabRef/jabref,Siedlerchr/jabref