CPCoding support for CPResponder menus. This allows context menus to be set for collection view items through the item prototype.

AppKit/CPResponder.j

@@ -341,7 +341,8 @@ CPDeleteForwardKeyCode  = 46;
 
 @end
 
-var CPResponderNextResponderKey = @"CPResponderNextResponderKey";
+var CPResponderNextResponderKey = @"CPResponderNextResponderKey",
+    CPResponderMenuKey = @"CPResponderMenuKey";
 
 @implementation CPResponder (CPCoding)
 
@@ -355,7 +356,10 @@ var CPResponderNextResponderKey = @"CPResponderNextResponderKey";
     self = [super init];
 
     if (self)
+    {
         _nextResponder = [aCoder decodeObjectForKey:CPResponderNextResponderKey];
+        _menu = [aCoder decodeObjectForKey:CPResponderMenuKey];
+    }
 
     return self;
 }
@@ -369,6 +373,8 @@ var CPResponderNextResponderKey = @"CPResponderNextResponderKey";
     // This will come out nil on the other side with decodeObjectForKey:
     if (_nextResponder !== nil)
         [aCoder encodeConditionalObject:_nextResponder forKey:CPResponderNextResponderKey];
+
+    [aCoder encodeObject:_menu forKey:CPResponderMenuKey];
 }
 
 @end