Preserve template settings when replacing a QApp within a scheduled GApp

NetBrain currently loses the associated template settings when a QApp within a scheduled GApp is replaced, resulting in a 'no template found' error and requiring the user to re-select both the GApp and the template. This enhancement would allow the system to retain the existing template configuration when only the QApp is swapped, without forcing a full re-selection of the GApp and template. Preserving these settings would reduce manual reconfiguration effort and prevent scheduling errors for customers who routinely update QApps within their scheduled automation workflows.