[enh] Display balance only if used

coin/members/admin.py

@@ -86,7 +86,7 @@ class OfferSubscriptionInline(admin.TabularInline):
 class MemberAdmin(UserAdmin):
     list_display = ('id', 'status', 'username', 'first_name', 'last_name',
                     'nickname', 'organization_name', 'email',
-                    'end_date_of_membership', 'balance')
+                    'end_date_of_membership')
     list_display_links = ('id', 'username', 'first_name', 'last_name')
     list_filter = ('status', MembershipFeeFilter)
     search_fields = ['username', 'first_name', 'last_name', 'email', 'nickname']
@@ -257,6 +257,8 @@ class MemberAdmin(UserAdmin):
 
     bulk_send_call_for_membership_fee_email.short_description = 'Envoyer le courriel de relance de cotisation'
 
+if settings.HANDLE_BALANCE:
+    MemberAdmin.list_display.append('balance')
 
 class MembershipFeeAdmin(admin.ModelAdmin):
     list_display = ('member', 'end_date', 'amount', 'payment_method',