[gen] Added attribute Field.view allowing to specify, for any field, an alternative pxView.

gen/mixins/__init__.py

@@ -533,6 +533,8 @@ class BaseMixin:
             except Exception, e:
                 tb = sutils.Traceback.get()
                 res = XmlMarshaller(rootTag='exception').marshall(tb)
+                import transaction
+                transaction.abort()
         return res
 
     def say(self, msg, type='info'):

gen/wrappers/__init__.py

@@ -553,7 +553,7 @@ class AbstractWrapper(object):
       </x>
      </div>''')
 
-    # Displays the fields of a given page for a given object.
+    # Display the fields of a given page for a given object
     pxFields = Px('''
      <table width=":layout.width">
       <tr for="field in groupedFields">