Set taskbar buttons to 200px default

Test Plan: The button for open windows in the task bar should change from 400px wide to 200px wide

Reviewers: wxl, tsimonq2

Reviewed By: wxl, tsimonq2

Differential Revision: https://phab.lubuntu.me/D16

debian/changelog

@@ -1,3 +1,9 @@
+lubuntu-default-settings (1.14) cosmic; urgency=low
+
+  * Set default taskbar buttons to 200px width. 
+
+ -- Wendy Hill <wjeh0810@gmail.com>  Thu, 27 Sep 2018 14:08:20 -0600
+
 lubuntu-default-settings (1.13) cosmic; urgency=medium
 
   * Blacklist nm-tray from System Tools menu category.

src/etc/xdg/xdg-Lubuntu/lxqt/panel.conf

@@ -21,6 +21,7 @@ alignment=Left
 
 [taskbar]
 type=taskbar
+buttonWidth=200
 
 [tray]
 type=tray