Certify key.

In-place editing with a popup if user is allowed in app config file.
User must of course manage at least a private key. User identities of
target key may be selectively chosen. Optionally, certification may be
exportable and non-revocable.

global.h

@@ -20,6 +20,10 @@ const WString _APPNAME_("K7");
 const WString _APPVERSION_("1");
 const WString _SPACE_(" ");
 const WString _COLON_(":");
+const WString _BRACKET_OPEN_("(");
+const WString _BRACKET_CLOSE_(")");
+const WString _ANGLE_BRACKET_OPEN_("<");
+const WString _ANGLE_BRACKET_CLOSE_(">");
 
 typedef map<int, WString> UidValidityMap;
 typedef map<int, WString> OwnerTrustMap;