few improvements on article category

- add verbose names to ArticleCategory fields
- add button to view categories list from articles list
- fix article_update template in form validation
- improve interface for articlecategory_update
- revert vanished urls (happened in merge with master...)

kfet/migrations/0052_category_addcost.py

@@ -14,6 +14,11 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='articlecategory',
             name='has_addcost',
-            field=models.BooleanField(default=True),
+            field=models.BooleanField(default=True, help_text="Si oui et qu'une majoration est active, celle-ci sera appliquée aux articles de cette catégorie.", verbose_name='majorée'),
+        ),
+        migrations.AlterField(
+            model_name='articlecategory',
+            name='name',
+            field=models.CharField(max_length=45, verbose_name='nom'),
         ),
     ]