[main] Introduce switcher and launcher to each other for co-operation.

src/qml/AppLauncher.qml

@@ -39,6 +39,7 @@ GridView {
     property Item reorderItem
     property bool onUninstall
     property alias deleter: deleter
+    property var switcher: null
 
     // just for margin purposes
     header: Item {

src/qml/AppSwitcher.qml

@@ -37,6 +37,8 @@ Item {
     property bool closeMode: false
     property bool visibleInHome: false
     property alias runningAppsCount: switcherModel.itemCount
+    property var switchModel: switcherModel
+    property var launcher: null
 
     onVisibleInHomeChanged: {
         // Exit close mode when scrolling out of view

src/qml/MainScreen.qml

@@ -93,12 +93,14 @@ Page {
             AppLauncher {
                 id: launcher
                 height: pager.height
+                switcher: switcher
             }
             AppSwitcher {
                 id: switcher
                 width: pager.width
                 height: pager.height
                 visibleInHome: x > -width && x < desktop.width
+                launcher: launcher
             }
             FeedsPage {
                 id: feeds