Reset the keyboard to the system default on program exit

This fixes WS-253.

Change-Id: I7cd61338e85533165c92e796979494d5e66ae97d
Fix for changes to ThumbnailViewer in palaso

Two properties (at least the setters) no longer exist.

Change-Id: I11c255a15afe207be9ef26175a18727d1e8e2836
Add svg icons to Installer_Linux

Copied svg files from artwork directory and renamed files to match
desktop icon description. Made sure any embedded artifacts were
removed from SVG (using Inkscape). Created a scalable/apps path in
Installer_Linux that satisfies xdg definition for svg images.

Change-Id: I437a7030ebfab88081a8194cba67907bdeef89c6