Bug 861103 - Fix for 'Install Later' in B2G updates. r=dhylands, a=tef+

b2g/components/UpdatePrompt.js

@@ -420,7 +420,7 @@ UpdatePrompt.prototype = {
         // for the user to press Later or Install Now. In this situation we
         // don't want to clear this._update, becuase handleApplyPromptResult
         // needs it.
-        if (this._applyPromptTimer == null) {
+        if (this._applyPromptTimer == null && !this._waitingForIdle) {
           this._update = null;
         }
         break;