add visual change bubble

Author: xsalonx

lib/public/models/DataExportModel.js

@@ -85,6 +85,7 @@ export class DataExportModel extends Observable {
      */
     setTotalExistingItemsCount(totalExistingItemsCount) {
         this._totalExistingItemsCount = totalExistingItemsCount;
+        this._visualChange$.notify();
     }
 
     /**
@@ -101,6 +102,7 @@ export class DataExportModel extends Observable {
      */
     setDisabled(disabled) {
         this._disabled = disabled;
+        this._visualChange$.notify();
     }
 
     /**

lib/public/views/Runs/Overview/RunsOverviewModel.js

@@ -99,6 +99,7 @@ export class RunsOverviewModel extends OverviewPageModel {
 
         this._exportModel = new DataExportModel(this._allItems$, dataExportConfiguration, () => this.loadAll());
         this._exportModel.bubbleTo(this);
+        this._exportModel.visualChange$.bubbleTo(this);
         this._item$.observe(() => {
             this._exportModel.setDisabled(!this.hasAnyData());
             this._exportModel.setTotalExistingItemsCount(this._pagination.itemsCount);