Add how to open notification prefrences

source/2/2.1/2.1.3/Quasel_IRC.rst

@@ -23,6 +23,8 @@ To use Sasl authentication to autologin to an account no matter which nickname y
 
 To add close the list of nicknames or channels press the X button. To reopen the view of nicks :menuselection:`View --> Nicks`.  
 
+To change your settings on your notifications :menuselection:`Settings --> Notificiations`.
+
 Screenshot
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 .. image:: quassel_irc.png