activate single windows directly in !compositing

--meaning to not activate the previews window in that
case. Single windows should be activated immediately
after left click, previews are not necessary in that
case.

FIXED-IN:0.9.2

plasmoid/package/contents/ui/task/TaskItem.qml

@@ -844,10 +844,9 @@ MouseArea{
             } else if (mouse.button == Qt.LeftButton){
                 if( !taskItem.isLauncher ){
                     if ( (root.leftClickAction === Latte.Types.PreviewWindows && isGroupParent)
-                            || (Latte.WindowSystem.isPlatformWayland
+                            || ( (Latte.WindowSystem.isPlatformWayland || !Latte.WindowSystem.compositingActive)
                                 && root.leftClickAction === Latte.Types.PresentWindows
-                                && isGroupParent)
-                            || !Latte.WindowSystem.compositingActive) {
+                                && isGroupParent) ) {
                         if(windowsPreviewDlg.activeItem !== taskItem){
                             showPreviewWindow();
                         } else {