message: Forming the flow diagram properly when the flow does not have any activity
diff: @@ -93,7 +93,9 @@ export class FlogoFlowsDetailDiagramComponent implements AfterViewInit {
  ngAfterViewInit() {
  let _enabledSelectTrigger = false;
  - if ( _.isEmpty( this.diagram ) || _.isEmpty( this.diagram.root ) ) {
  + if ( _.isEmpty( this.diagram ) ||
  + (this.id === 'errorHandler' && _.isEmpty( this.diagram.root )) ||
  + (this.id === 'root' && !this.diagram.hasTrigger ) ) {
  this.diagram = FlogoFlowDiagram.getEmptyDiagram(this.id === 'errorHandler' ? 'error' : null );
  if (this.id === 'errorHandler') {
  } else {
  