Revision Graph: Show ref name of other ref types instead of leaving it empty

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Use the English words for "p_strDateiname" and "strLangProduktVersion"

Based on TortoiseSVN revision 24610, 24611

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>