add a variant for the KDE expand systray needle

failed on prod and staging today, panel seems to be lighter in
color; not sure if it's just a random variation or a KDE change
or what...

needles/kde/desktop_expand_systray-lighter.json

@@ -0,0 +1,16 @@
+{
+  "area": [
+    {
+      "ypos": 743,
+      "xpos": 851,
+      "height": 18,
+      "type": "match",
+      "width": 17
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "DESKTOP-kde",
+    "desktop_expand_systray"
+  ]
+}