Updates for renamed EditWorkflowEvent method.

Refactored PipelineEditorWindowConfig::get/setLegacyAppTemplateJson to get/setServiceWorkflowJson.
Refactored references to templates in ShowWindowEventHandler::onEditWorkflow.
Updates for new PipelineViewPresenter::setPipeline methods.

Updated PipelineEditorWindow to attempt to set the PipelineViewPresenter with Service Workflow JSON from the config if it does not already have a Pipeline.