admin: reduce textarea size of ligne's intitule field

eo_gestion/eo_facture/admin.py

@@ -22,9 +22,11 @@ from django.conf.urls import url
 from django.shortcuts import render
 from django.urls import reverse
 from django.contrib.admin.options import BaseModelAdmin
+from django.db.models import TextField
 import django.http as http
 from django.contrib.humanize.templatetags.humanize import ordinal
 from django.forms.models import BaseInlineFormSet
+from django.forms import Textarea
 from django.utils.html import format_html
 from django.utils.six import BytesIO
 
@@ -93,6 +95,11 @@ class LigneInline(SelectRelatedMixin, SortableInlineAdminMixin, admin.TabularInl
     model = models.Ligne
     original = False
     verbose_name_plural = "Lignes de facture (vous pouvez les réordonner par drag&drop)"
+    formfield_overrides = {
+        TextField: {
+            'widget': Textarea(attrs={'cols': 30, 'rows': 1}),
+        }
+    }
 
 
 class ActiveFilter(admin.SimpleListFilter):