fix(hmr): After HMR app is blank when re-launched (#2108)

Author: Alexander Vakrilov

nativescript-angular/platform-common.ts

@@ -191,19 +191,8 @@ export class NativeScriptPlatformRef extends PlatformRef {
     @profile
     private bootstrapNativeScriptApp() {
         const autoCreateFrame = !!this.appOptions.createFrameOnBootstrap;
-        let tempAppHostView: AppHostView;
         let rootContent: View;
 
-        if (autoCreateFrame) {
-            const { page, frame } = this.createFrameAndPage(false);
-            setRootPage(page);
-            rootContent = frame;
-        } else {
-            // Create a temp page for root of the renderer
-            tempAppHostView = new AppHostView();
-            setRootPage(<any>tempAppHostView);
-        }
-
         if (isLogEnabled()) {
             bootstrapLog("NativeScriptPlatform bootstrap started.");
         }
@@ -214,6 +203,17 @@ export class NativeScriptPlatformRef extends PlatformRef {
                     bootstrapLog("Application launch event fired");
                 }
 
+                let tempAppHostView: AppHostView;
+                if (autoCreateFrame) {
+                    const { page, frame } = this.createFrameAndPage(false);
+                    setRootPage(page);
+                    rootContent = frame;
+                } else {
+                    // Create a temp page for root of the renderer
+                    tempAppHostView = new AppHostView();
+                    setRootPage(<any>tempAppHostView);
+                }
+
                 let bootstrapPromiseCompleted = false;
                 this._bootstrapper().then(
                     moduleRef => {