Wie kann man die Anzahl ungelesener Nachrichten in der Navigations-Seitenleiste in einen Punkt ändern?

[Moin]

There is also a site setting to configure the default for the option in the user preferences Lilly showed you

@Moin

default sidebar show count of new items

The setting controls how new items are shown in the sidebar:

Dots/Badges	Counts