adds filters for ModelLog

sync/admin.py

@@ -21,7 +21,7 @@ class SyncedObjectAdmin(admin.ModelAdmin):
 
 class ModelLogAdmin(admin.ModelAdmin):
     list_display = ['get_users', 'date', 'operation', 'model_id', 'model_name']
-    list_filter = ['users']
+    list_filter = ['users', 'operation', 'model_name']
     ordering = ['-date']
     search_fields = ['model_id']