Proper fix for RoundShadow reference error:

- RoundShadow has to go into private/ subdirectory
- Copy ButtonShadow from desktop components as well, it's needed at
  runtime

declarativeimports/plasmacomponents/CMakeLists.txt

@@ -62,6 +62,7 @@ install(FILES qml/ToolBar.qml DESTINATION ${PLUGIN_INSTALL_DIR}/platformimports/
 
 
 #Now install the private stuff!
+install(FILES qml/private/ButtonShadow.qml DESTINATION ${PLUGIN_INSTALL_DIR}/platformimports/touch/org/kde/plasma/components/private)
 install(FILES qml/private/DualStateButton.qml DESTINATION ${PLUGIN_INSTALL_DIR}/platformimports/touch/org/kde/plasma/components/private)
 install(FILES qml/private/IconLoader.qml DESTINATION ${PLUGIN_INSTALL_DIR}/platformimports/touch/org/kde/plasma/components/private)
 install(FILES qml/private/PageStack.js DESTINATION ${PLUGIN_INSTALL_DIR}/platformimports/touch/org/kde/plasma/components/private)

declarativeimports/plasmacomponents/platformcomponents/touch/ToolButton.qml

@@ -144,7 +144,7 @@ Item {
                 property int right: 8
                 property int bottom: 8
             }
-            RoundShadow {
+            Private.RoundShadow {
                 anchors.fill: parent
                 state: (internal.userPressed || checked) ? "hidden" : "shadow"
             }