log: add load_ref_decorations() Move the loading of all ref names for decoration into its own function. A static variable prevents loading twice, because it's quite expensive. We can do it this way because we currently never unload decorations. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>