automatically grow textareas to the size of their content. fixes #123

pyweb/djextdirect/formprovider.py

@@ -270,6 +270,7 @@ class FormProvider(Provider):
             elif isinstance( field.widget, forms.Textarea ):
                 extfld.update({
                     "xtype": "textarea",
+                    "grow":  True,
                     })
             elif isinstance( field.widget, forms.PasswordInput ):
                 extfld.update({