W32: Add a g_app_info_get_all_for_type() implementation
W32: Add a g_app_info_get_all_for_type() implementation

Also add g_app_info_get_fallback_for_type() and
g_app_info_get_recommended_for_type() as proxies for
g_app_info_get_all_for_type(), until gcontenttype support is improved.

johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib