Fix TypeError in NotificationsList Component

[bodhish]

Related to #8006

Implements error handling and service worker checks in the NotificationsList component to prevent TypeError on unsupported browsers.

• Service Worker and Push Manager Checks: Adds a check for the availability of navigator.serviceWorker and reg.pushManager before attempting to subscribe or unsubscribe to push notifications. This prevents errors in browsers where these features are not supported.
• Error Handling: Implements a try-catch block around the subscription status check logic within intialSubscriptionState function. This captures any errors that occur during the check, preventing the application from crashing and logs the error using Sentry.
• Subscription Status: Modifies the logic to set the subscription status to "Error" in case of any exceptions during the initial subscription state check, ensuring the UI can react appropriately to the error state.

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Name	Status	Preview	Comments	Updated (UTC)
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[bodhish]

@gigincg can you review my PR? :D

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