Meta: Port recent changes to the GN build

389a55fe36bd6d577b37664f7819628f6f42b25d

Meta/gn/secondary/Ladybird/BUILD.gn

@@ -17,6 +17,7 @@ moc_qt_objects("generate_moc") {
     "Qt/AutoComplete.h",
     "Qt/BrowserWindow.h",
     "Qt/EventLoopImplementationQtEventTarget.h",
+    "Qt/FindInPageWidget.h",
     "Qt/InspectorWidget.h",
     "Qt/LocationEdit.h",
     "Qt/Settings.h",
@@ -91,6 +92,7 @@ executable("ladybird_executable") {
       "Qt/BrowserWindow.cpp",
       "Qt/EventLoopImplementationQt.cpp",
       "Qt/EventLoopImplementationQtEventTarget.cpp",
+      "Qt/FindInPageWidget.cpp",
       "Qt/Icon.cpp",
       "Qt/InspectorWidget.cpp",
       "Qt/LocationEdit.cpp",