Fix delete failure when no osd item selected (#452)

Signed-off-by: Joshua Li <joshuali925@gmail.com>
(cherry picked from commit a4a310e)
Signed-off-by: TackAdam <navytackett@hotmail.com>

Author: joshuali925

public/services/saved_objects/saved_object_client/saved_objects_actions.ts

@@ -103,7 +103,7 @@ export class SavedObjectsActions {
 
     const remainingObjectIds = [
       ...new Set(
-        idMap.non_osd.concat(
+        idMap.non_osd?.concat(
           Object.entries(responses.deleteResponseList)
             .filter(([_, status]) => status !== 'OK')
             .map(([id, _]) => id)