Wallpaper Config: Centralise kdesk config

Migrate the different kdesk configurations for the wallpapers
(originally from Kano Dashboard) into this central location.

debian/kano-wallpapers-variant-edu-ar.links

@@ -1,3 +1,5 @@
 usr/share/kano-desktop/wallpapers/edu-ar-1024.png usr/share/kano-desktop/wallpapers/kanux-default-1024.png
 usr/share/kano-desktop/wallpapers/edu-ar-16-9.png usr/share/kano-desktop/wallpapers/kanux-default-16-9.png
 usr/share/kano-desktop/wallpapers/edu-ar-4-3.png usr/share/kano-desktop/wallpapers/kanux-default-4-3.png
+usr/share/kano-desktop/wallpapers/edu-ar-dark.png usr/share/kano-desktop/wallpapers/kanux-default-dark.png
+usr/share/kano-desktop/wallpapers/edu-ar-corners.png usr/share/kano-desktop/wallpapers/kanux-default-corners.png

debian/kano-wallpapers.links

@@ -1,3 +1,5 @@
 usr/share/kano-desktop/wallpapers/clouds-1024.png usr/share/kano-desktop/wallpapers/kanux-default-1024.png
 usr/share/kano-desktop/wallpapers/clouds-16-9.png usr/share/kano-desktop/wallpapers/kanux-default-16-9.png
 usr/share/kano-desktop/wallpapers/clouds-4-3.png usr/share/kano-desktop/wallpapers/kanux-default-4-3.png
+usr/share/kano-desktop/wallpapers/clouds-dark.png usr/share/kano-desktop/wallpapers/kanux-default-dark.png
+usr/share/kano-desktop/wallpapers/clouds-corners.png usr/share/kano-desktop/wallpapers/kanux-default-corners.png

kdesk/kdeskrc_corners

@@ -0,0 +1,3 @@
+Background.File-4-3: /usr/share/kano-desktop/wallpapers/kanux-default-corners.png
+Background.File-medium: /usr/share/kano-desktop/wallpapers/kanux-default-corners.png
+Background.File-16-9: /usr/share/kano-desktop/wallpapers/kanux-default-corners.png

kdesk/kdeskrc_dark

@@ -0,0 +1,3 @@
+Background.File-4-3: /usr/share/kano-desktop/wallpapers/kanux-default-dark.png
+Background.File-medium: /usr/share/kano-desktop/wallpapers/kanux-default-dark.png
+Background.File-16-9: /usr/share/kano-desktop/wallpapers/kanux-default-dark.png

kdesk/kdeskrc_plain

@@ -0,0 +1,15 @@
+# kdeskrc_plain
+#
+# Copyright (C) 2014-2017 Kano Computing Ltd.
+# License: http://www.gnu.org/licenses/gpl-2.0.txt GNU GPL v2
+#
+#
+
+
+  Background.Delay: 0
+  Background.Source: /
+  Background.File-medium: /usr/share/kano-desktop/wallpapers/kanux-default-1024.png
+  Background.File-4-3: /usr/share/kano-desktop/wallpapers/kanux-default-4-3.png
+  Background.File-16-9: /usr/share/kano-desktop/wallpapers/kanux-default-16-9.png
+  Background.Mode: scale
+  Background.Color: #C2CCFF

kdesk/kdeskrc_screensaver

@@ -0,0 +1,3 @@
+  ScreenSaverTimeout: 900
+  ScreenSaverProgram: /bin/true
+  IconHook: /usr/share/kano-desktop/kdesk/icon-hooks.sh