Add quassel prefrences interface screenshot

source/2/2.1/2.1.3/Quassel_IRC.rst

@@ -53,6 +53,8 @@ Customizing
 -----------
 To change your preferences for quassel press :kbd:`F7` or :menuselection:`Settings --> Configure Quassel`. To choose a language for your chat change the :guilabel:`Language` drop down menu. To change the client style for the widget of quassel choose a widget style from the :guilabel:`Widget style` drop down menu. To toggle showing tray icon check/uncheck the :guilabel:`Show system tray icon` checkbox. If you want to be able to close the quassel window and still have quassel running in the system tray to bring it back up check the :guilabel:`Hide to tray on close button`. To change which icon theme you use for quassel use the :guilabel:`Fallback icon theme` drop down menu and to have it replace your system icon theme press the :guilabel:`Override system theme`.
 
+.. image:: quassel-pref-interface.png
+
 The :guilabel:`Chat view` tab has settings for colors timestamps and hyperlinks. To toggle showing brackets around everyone's nicknames check the :guilabel:`Show brackets around sender names`. To chose a custom chat window font press the :guilabel:`Custom chat window font` checkbox and then press the :guilabel:`Choose` button to choose a new font. To toggle if you want colored text press/unpress the :guilabel:`Allow colored text` checkbox.  To toggle previews of hyperlinks in chat check/uncheck the :guilabel:`Show previews of webpages on URL hover`. To toggle setting marker line when switching chats check/uncheck the :guilabel:`Set marker line automatically when switching chats`. To toggle the set marker line automatically when you switch windows check/uncheck  the :guilabel:`Set marker line automatically when Quassel loses focus` checkbox. 
 
 .. image:: quasselpref.png