Check_MK Werk 6923: Parent scan is now based on the background job logic

ID: 6923 Title: Parent scan is now based on the background job logic Component: WATO Level: 1 Class: New feature Version: 1.6.0i1 The parent scan is no longer affected by GUI timeouts because it is executed in a background job. The progress dialog is now based on the generic background job handling. The execution logic of the parent scan hasn't changed.