[Notifications] Run countdown when no reply was typed

When the notification popup loses focus with nothing typed into the reply field,
restart timer.

applets/notifications/package/contents/ui/NotificationItem.qml

@@ -95,6 +95,7 @@ ColumnLayout {
     readonly property bool dragging: (thumbnailStripLoader.item && thumbnailStripLoader.item.dragging)
                                         || (jobLoader.item && jobLoader.item.dragging)
     property bool replying: false
+    readonly property bool hasPendingReply: replyLoader.item && replyLoader.item.text !== ""
 
     signal bodyClicked
     signal closeClicked

applets/notifications/package/contents/ui/NotificationPopup.qml

@@ -154,7 +154,8 @@ PlasmaCore.Dialog {
                     if (notificationItem.dragging || notificationItem.menuOpen) {
                         return false;
                     }
-                    if (notificationItem.replying) {
+                    if (notificationItem.replying
+                            && (notificationPopup.active || notificationItem.hasPendingReply)) {
                         return false;
                     }
                     return true;