[Certification] Improve admin interface to better management

courses/certification/admin.py

@@ -7,7 +7,22 @@ from .models import (
     Evaluation,
 )
 
-admin.site.register(CourseCertification)
-admin.site.register(CertificateTemplate)
+@admin.register(CertificateTemplate)
+class CertificateTemplateAdmin(admin.ModelAdmin):
+    list_display = ('course', 'document_type', 'workspace')
+
+
+@admin.register(CourseCertification)
+class CourseCertificationAdmin(admin.ModelAdmin):
+    list_display = ('course_student', 'type', 'link_hash', 'created_date', 'modified_date')
+    autocomplete_fields = (
+        'course_student',
+    )
+    search_fields = (
+        'link_hash',
+        'course_student__user__name',
+        'course_student__user__username',
+    )
+
 admin.site.register(CertificationProcess)
 admin.site.register(Evaluation)