Merge pull request #221 from buildingSMART/IVS-625---Update-Django-Admin

IVS-625 - Update Django Admin (low-prio)

Author: Ghesselink

backend/apps/ifc_validation/admin.py

@@ -612,13 +612,13 @@ def company_link(self, obj):
         )
     company_link.admin_order_field = 'useradditionalinfo__company'
 
-    @admin.display(description="Is Vendor?")
+    @admin.display(description="Is Vendor?", boolean=True)
     def is_vendor(self, obj):
 
         return None if obj.useradditionalinfo is None else obj.useradditionalinfo.is_vendor
     is_vendor.admin_order_field = 'useradditionalinfo__is_vendor'
 
-    @admin.display(description="Is Vendor (self-declared)?")
+    @admin.display(description="Is Vendor (self-declared)?", boolean=True)
     def is_vendor_self_declared(self, obj):
 
         return None if obj.useradditionalinfo is None else obj.useradditionalinfo.is_vendor_self_declared