Use str __name__ for generated simple view classes.

This fixes LP #1129030

doc/CHANGES.rst

@@ -8,6 +8,9 @@ http://docs.zope.org/zope2/releases/.
 2.13.20 (unreleased)
 --------------------
 
+- Make sure the generated classes for simple browser pages (SimpleViewClasses)
+  have a str __name__. See LP #1129030.
+
 - In PageTemplate.pt_errors accept the check_macro_expansion argument.
   This is added for compatibility with zope.pagetemplate 4.0.0.  The
   argument is ignored.  See LP #732972.

src/Products/Five/browser/metaconfigure.py

@@ -59,6 +59,7 @@ def page(_context, name, permission, for_,
          attribute='__call__', menu=None, title=None,
          ):
 
+    name = str(name)  # De-unicode
     _handle_menu(_context, menu, title, [for_], name, permission)
 
     if not (class_ or template):