always stop before rerunning.

lib/App.ts

@@ -489,7 +489,7 @@ module TDev.RT {
                     HTML.mkButton(lf("play again"),() => {
                         tick(Ticks.runtimePlayAgain);
                         m.dismiss();
-                        rt.rerun()
+                        rt.rerunAsync().done();
                     }, 'wall-dialog-button-huge'),
                     !scriptId ? HTML.mkButton(lf("dismiss"),() => {
                         m.dismiss();

lib/Time.ts

@@ -1,7 +1,7 @@
 ///<reference path='refs.ts'/>
 module TDev.RT {
     //? time and dates
-    //@ robust skill(2)
+    //@ robust
     export module Time
     {
         var _rt : Runtime;

rt/rt.ts

@@ -1755,10 +1755,12 @@ module TDev
         private startMk: any;
         private startArgs: any[];
 
-        public rerun() {
-            Util.assert(this.isStopped(), "rerun-isStopped")
-            this.initPageStack();
-            this.run(this.startMk, this.startArgs);
+        public rerunAsync() : Promise {
+            return this.stopAsync().then(() => {
+                Util.assert(this.isStopped(), "rerun-isStopped")
+                this.initPageStack();
+                this.run(this.startMk, this.startArgs);
+            });
         }
 
         public run(mk: any, args: any[]) {