Fix #361 - Panel is off-positioned after monitor wake up.

Widgets/NPanel.qml

@@ -87,9 +87,18 @@ Loader {
     // Get the button position if provided
     if (buttonItem !== undefined && buttonItem !== null) {
       useButtonPosition = true
-
-      var itemPos = buttonItem.mapToItem(null, 0, 0)
-      buttonPosition = Qt.point(itemPos.x, itemPos.y)
+      // Try to get the button's window
+      var buttonWindow = buttonItem.Window.window
+      if (buttonWindow) {
+        // Map to button's window coordinates
+        var itemPosInWindow = buttonItem.mapToItem(buttonWindow.contentItem, 0, 0)
+        // Then account for window position on screen
+        buttonPosition = Qt.point(buttonWindow.x + itemPosInWindow.x, buttonWindow.y + itemPosInWindow.y)
+      } else {
+        // Fallback to old method
+        var itemPos = buttonItem.mapToItem(null, 0, 0)
+        buttonPosition = Qt.point(itemPos.x, itemPos.y)
+      }
       buttonWidth = buttonItem.width
       buttonHeight = buttonItem.height
     } else {