Fix typeo in CPToolbar.j CPToolbarItems to not respect maxSize. Closes #1305.

AppKit/CPToolbar.j

@@ -1015,7 +1015,7 @@ var TOP_MARGIN      = 5.0,
     _labelSize = [_labelField frame].size;
 
     _minSize = CGSizeMake(MAX(_labelSize.width, minSize.width), _labelSize.height + minSize.height + LABEL_MARGIN + TOP_MARGIN);
-    _maxSize = CGSizeMake(MAX(_labelSize.width, minSize.width), 100000000.0);
+    _maxSize = CGSizeMake(MIN(_labelSize.width, maxSize.width), 100000000.0);
 
     [_toolbar tile];
 }