close popup upon item select

klipper follows the pattern of a menu, in order to be consistent
with other applets that use this pattern (like launchers or
device notifier) close the menu after cliching on an item
to show the user something happened

BUG:361629

applets/clipboard/contents/ui/ClipboardItemDelegate.qml

@@ -41,7 +41,10 @@ PlasmaComponents.ListItem {
 
     enabled: true
 
-    onClicked: menuItem.itemSelected(UuidRole)
+    onClicked: {
+        menuItem.itemSelected(UuidRole);
+        plasmoid.expanded = false;
+    }
     onContainsMouseChanged: {
         if (containsMouse) {
             menuListView.currentIndex = index