Add screenshot for ARK and 2048-qt and fix witdh of qterminal screenshot.

source/2/2.4/2.4.1/ARK.rst

@@ -11,6 +11,11 @@ Supported file formats include:
  - Tar acrhieves compressed with bzip, gzip, lzip, LZMA, XZ compressed 
  - Zip Archieves
 
+Screenshot
+----------
+.. image:: ARK.png
+ :width 80%: 
+
 Version
 -------
 Lubuntu ships version 4:18.04.3 of ARK. 

source/2/2.4/2.4.8/2048-qt.rst

@@ -7,6 +7,11 @@ Useage
 ------
 To play 2048-qt you use the arrows keys to combine blocks with the same number on them.
 
+Screenshot
+----------
+.. image:: 2048-qt.png 
+   :width 80%: 
+
 Version
 -------
 Lubuntu ships with version 0.1.6 of 2048-Qt. 

source/3/3.1/3.1.3/qterminal.rst

@@ -15,7 +15,7 @@ Screenshot
 ----------
 
 .. image:: qterminal.png
-
+   :width 80%: 
 How to launch
 -------------
 To launch qterminal in a normal window go to the menu -> System Tools -> qterminal or run qterminal from the command line. To launch a drop down version of Qterminal from the menu -> System Tools -> qterminal drop down  or run qterminal -d from the command line.