#62 Add File menu item to custom menu
#62 Add File menu item to custom menu

*  Adds blank "File" menu item to the custom menu.
*  Submenu items and related functionality to be added through issues #63-#65.

Signed-off-by: John M. Horan <62b1a4b1cb52bcf40f8267031eadbe72224a36da@gmail.com>

nexB/aboutcode-manager,nexB/aboutcode-manager,nexB/aboutcode-manager