Fix KDE live notification test (dismiss network notification)

KDE in F28+ seems to show a network connection notification on
live boot, for some reason. Just dismiss it to help the test
pass.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/kde/desktop_network_dismiss-kde.json

@@ -0,0 +1,16 @@
+{
+  "tags": [
+    "DESKTOP-kde",
+    "desktop_notification_dismiss"
+  ],
+  "area": [
+    {
+      "xpos": 992,
+      "ypos": 435,
+      "width": 15,
+      "height": 16,
+      "type": "match"
+    }
+  ],
+  "properties": []
+}

needles/kde/desktop_network_notification-kde.json

@@ -0,0 +1,16 @@
+{
+  "tags": [
+    "DESKTOP-kde",
+    "desktop_network_notification"
+  ],
+  "area": [
+    {
+      "xpos": 641,
+      "ypos": 430,
+      "width": 142,
+      "height": 21,
+      "type": "match"
+    }
+  ],
+  "properties": []
+}

tests/desktop_notifications.pm

@@ -87,6 +87,11 @@ sub run {
         # the notifications bit
         assert_and_click 'desktop_expand_systray';
         assert_and_click 'desktop_systray_notifications';
+        # In F28+ we seem to get a network connection notification
+        # here. Let's dismiss it.
+        if (check_screen 'desktop_network_notification', 5) {
+            assert_and_click 'desktop_notification_dismiss';
+        }
     }
     if (get_var("BOOTFROM")) {
         # we should see an update notification and no others