add tabs to notification log modal

[rushy-me]

adds tabs to the notification log so plugins can have their own filtered view. plugins can register a tab via the notificationLogTab property

already added it to betterSessions and relationshipNotifier as examples

[Vendicated]

This should just be a prop passed to the showNotification function

showNotification({
	category: "Example Category",
	title: "Cool Title",
	body: "wowie"
});