diff -up plasma-workspace-5.7.3/lookandfeel/contents/defaults.orig plasma-workspace-5.7.3/lookandfeel/contents/defaults
--- plasma-workspace-5.7.3/lookandfeel/contents/defaults.orig	2016-08-02 06:17:43.000000000 -0500
+++ plasma-workspace-5.7.3/lookandfeel/contents/defaults	2016-08-02 12:31:24.335614522 -0500
@@ -18,3 +18,6 @@ LayoutName=org.kde.breeze.desktop
 
 [kwinrc][DesktopSwitcher]
 LayoutName=org.kde.breeze.desktop
+
+[Desktop][org.kde.plasma.desktop]
+Containment=org.kde.plasma.folder