[CORD-1117] XOS GUI Various fix

Change-Id: I4237a5e23509e9173c958d76aa929a70583ba1e6
diff --git a/src/app/datasources/helpers/model-discoverer.service.ts b/src/app/datasources/helpers/model-discoverer.service.ts
index 1078853..ba9cb13 100644
--- a/src/app/datasources/helpers/model-discoverer.service.ts
+++ b/src/app/datasources/helpers/model-discoverer.service.ts
@@ -25,6 +25,7 @@
   discover(): ng.IPromise<boolean>;
   get(modelName: string): IXosModel;
   getApiUrlFromModel(model: IXosModel): string;
+  areModelsLoaded(): boolean;
 }
 
 export class XosModelDiscovererService implements IXosModelDiscovererService {
@@ -41,6 +42,7 @@
   private xosModels: IXosModel[] = []; // list of augmented model definitions;
   private xosServices: string[] = []; // list of loaded services
   private progressBar;
+  private modelsLoaded: boolean = false;
 
   constructor (
     private $log: ng.ILogService,
@@ -56,6 +58,10 @@
     this.progressBar.setColor('#f6a821');
   }
 
+  public areModelsLoaded(): boolean {
+    return this.modelsLoaded;
+  }
+
   public get(modelName: string): IXosModel|null {
     return _.find(this.xosModels, m => m.name === modelName);
   }
@@ -119,6 +125,7 @@
           })
           .finally(() => {
             this.progressBar.complete();
+            this.modelsLoaded = true;
           });
       });
     return d.promise;