Fix of admin inlines with django admin

Now we can specify separate admin widget config:
    
    CKEDITOR_CONFIGS = {
        'default': {
            'toolbar': 'Basic',
        },
        'default_admin': {
            'toolbar': 'Basic',
            'admin_inline': True,
            'jquery_prefix': 'django.jQuery',
        }
    }

Where 'admin_inline' is a flag to use another mechanism to create CKEditor widget, and optional 'jquery_prefix' is your admin jQuery prefix,'django.jQuery' for default, it is useful when you has own jQuery for django admin.

Then you should create a ModelForm for your admin, and recreate CKEditorWidget with this config_name:

    class BlockAdminForm(ModelForm):
        def __init__(self, *args, ** kwargs):
            super(BlockAdminForm, self).__init__(*args, **kwargs)
            self.fields['content'].widget = CKEditorWidget(config_name='default_admin')

        class Meta:
            model = Block


    class BlockAdmin(StackedInline):
        model = Block
        form = BlockAdminForm
        extra = 1


    class SomeModelAdmin(ModelAdmin):
        inlines = [BlockAdmin]