[Xfce-i18n] "Button label|<string>" msgid-s translation

[SZERVÁC Attila]

 Hi,

 I don't understand "Button label|<string>" msgid-s.

 Is "Button level" a hint for translators ???

 Example:

#. the button label in the xfce-mcs-manager dialog
--------------------------------------------------
               ^
THIS IS A HINT |

#: ../plugin/xfcalendar_plugin.c:789
msgid "Button Label|Orage"
       ????????????

msgstr "Gomb cim|Orage / Orage / Kalendarium?"

 ?