[Enhancement request] Granular control for notification badge

[alicerunsonfedora]

Currently, the notification badge forcibly shows new notifications when the app receives a new one without accounting for any existing ones that the user might not have seen before. I often find myself opening the notifications panel time and time again because I don't see anything for new notifications.

There should be a new setting that dictates what the badge will display:

• The total notifications on the server
• Only new notifications

This might be toggled as a user string under the setting displayOnNotificationBadge with either a string or the type "all" | "new". In theory, this could probably be done as a bool so that it works with setUserDefaultBool and getUserDefaultBool.

[alicerunsonfedora]

The setting is now implemented with a boolean key, displayAllOnNotificationBadge. The setting is also located under "Notifications":