admin: import flatten_fieldsets() from django.contrib.admin.util for pre Django 1.7 compatibility
fixes #7365
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@ -11,7 +11,10 @@ from django.views.decorators.cache import never_cache
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from django.contrib.auth.admin import UserAdmin
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from django.contrib.sessions.models import Session
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from django.contrib.auth import REDIRECT_FIELD_NAME
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from django.contrib.admin.utils import flatten_fieldsets
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try:
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from django.contrib.admin.utils import flatten_fieldsets
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except ImportError:
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from django.contrib.admin.util import flatten_fieldsets
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from .nonce.models import Nonce
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from . import forms, models, admin_forms, compat, app_settings
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