Add navigateFrameWait for MSAL JS SystemOptions

Add documentation for `navigateFrameWait ` to the `SystemOptions` configuration object for MSAL JS.

Author: jasonnutter

articles/active-directory/develop/msal-js-initializing-client-applications.md

@@ -87,6 +87,7 @@ export type SystemOptions = {
     logger?: Logger;
     loadFrameTimeout?: number;
     tokenRenewalOffsetSeconds?: number;
+    navigateFrameWait?: number;
 };
 
 // Developer App Environment Support
@@ -136,6 +137,8 @@ Below is the total set of configurable options that are supported currently in t
 
 - **tokenRenewalOffsetSeconds**: Optional. The number of milliseconds which sets the window of offset needed to renew the token before expiry. Default is 300 milliseconds.
 
+- **navigateFrameWait**: Optional. The number of milliseconds which sets the wait time before hidden iframes navigate to their destination. Default is 500 milliseconds.
+
 These are only applicable to be passed down from the MSAL Angular wrapper library:
 - **unprotectedResources**: Optional.  Array of URIs that are unprotected resources. MSAL will not attach a token to outgoing requests that have these URI. Defaults to `null`.