Add screenshot for kde_partition manager.

source/3/3.1/3.1.7/kde_partitionmanager.rst

@@ -14,6 +14,10 @@ To check the health of your hard drive on the menu Device ->  SMART status.
 
 You can see your disk useage for each partition graphically with the bars at the top with the shaded in part showing a bar graph as the percentage full of the partition. The Column size shows the size of the entire system while the Used shows the amount of space used on the drive. The type field lets you see which filesystem is on the parttion.   
 
+Screensaver
+-----------
+.. image:: kde_partitionmanager.png
+
 How to launch
 -------------
 To launch kde partition manager from the menu -> system tools -> KDE partition manager or run partitionmanager from the command line.