Fix invite email links

[slomo]

No description provided.

[fuzzylogic2000]

Now it will not send the invitation: when I click submit, I get:
invite() takes 3 positional arguments but 4 were given

[slomo]

Stacktrace or didn't happen 😄

[fuzzylogic2000]

Environment:

Request Method: POST
Request URL: http://localhost:8000/en/ideas/create/module/ideas2017/

Django Version: 1.8.18
Python Version: 3.5.2
Installed Applications:
['wagtail.contrib.settings',
 'wagtail.wagtailforms',
 'wagtail.wagtailredirects',
 'wagtail.wagtailembeds',
 'wagtail.wagtailsites',
 'wagtail.wagtailusers',
 'wagtail.wagtailsnippets',
 'wagtail.wagtaildocs',
 'wagtail.wagtailimages',
 'wagtail.wagtailsearch',
 'wagtail.wagtailadmin',
 'wagtail.wagtailcore',
 'wagtail.contrib.wagtailstyleguide',
 'modelcluster',
 'taggit',
 'multiselectfield',
 'widget_tweaks',
 'crispy_forms',
 'webpack_loader',
 'easy_thumbnails',
 'ckeditor',
 'ckeditor_uploader',
 'django.contrib.sites',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django_countries',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'formtools',
 'autofixture',
 'rules.apps.AutodiscoverRulesConfig',
 'allauth',
 'allauth.account',
 'allauth.socialaccount',
 'adhocracy4.images.apps.ImagesConfig',
 'adhocracy4.phases.apps.PhasesConfig',
 'adhocracy4.projects.apps.ProjectsConfig',
 'adhocracy4.ratings.apps.RatingsConfig',
 'adhocracy4.reports.apps.ReportsConfig',
 'adhocracy4.modules.apps.ModulesConfig',
 'adhocracy4.comments.apps.CommentsConfig',
 'adhocracy4.organisations.apps.OrganisationsConfig',
 'cms.home.apps.HomeConfig',
 'cms.settings.apps.SettingsConfig',
 'cms.snippets.apps.SnippetsConfig',
 'cms.blog.apps.BlogConfig',
 'apps.contrib',
 'apps.users.apps.UsersConfig',
 'apps.ideas.apps.IdeasConfig',
 'apps.invites.apps.InvitesConfig',
 'debug_toolbar']
Installed Middleware:
['debug_toolbar.middleware.DebugToolbarMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'django.middleware.locale.LocaleMiddleware',
 'wagtail.wagtailcore.middleware.SiteMiddleware',
 'wagtail.wagtailredirects.middleware.RedirectMiddleware']


Traceback:
File "/home/katharina/a4-advocate-europe/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/katharina/a4-advocate-europe/lib/python3.5/site-packages/django/views/generic/base.py" in view
  71.             return self.dispatch(request, *args, **kwargs)
File "/home/katharina/a4-advocate-europe/lib/python3.5/site-packages/rules/compat/access_mixins.py" in dispatch
  126.         return super(PermissionRequiredMixin, self).dispatch(request, *args, **kwargs)
File "/home/katharina/a4-advocate-europe/apps/ideas/mixins.py" in dispatch
  25.         return super().dispatch(request, *args, **kwargs)
File "/home/katharina/a4-advocate-europe/lib/python3.5/site-packages/formtools/wizard/views.py" in dispatch
  244.         response = super(WizardView, self).dispatch(request, *args, **kwargs)
File "/home/katharina/a4-advocate-europe/lib/python3.5/site-packages/django/views/generic/base.py" in dispatch
  89.         return handler(request, *args, **kwargs)
File "/home/katharina/a4-advocate-europe/apps/wizards/mixins.py" in post
  69.                 return self.render_done(form, **kwargs)
File "/home/katharina/a4-advocate-europe/lib/python3.5/site-packages/formtools/wizard/views.py" in render_done
  361.         done_response = self.done(final_forms.values(), form_dict=final_forms, **kwargs)
File "/home/katharina/a4-advocate-europe/apps/ideas/views.py" in done
  111.                 email

Exception Type: TypeError at /en/ideas/create/module/ideas2017/
Exception Value: invite() takes 3 positional arguments but 4 were given

[slomo]

Fixed the issue discovered by @fuzzylogic2000 seems there is no test for actually sending an invite if idea sketches are created.

[mkind]

LGTM