FilePickerDialog: Port to GML compilation

Author: https://github.com/aryanbaburajan
Commit: 3ab05dbbb9
Pull-request: https://github.com/SerenityOS/serenity/pull/23782
Reviewed-by: https://github.com/timschumi ✅

Userland/Libraries/LibGUI/CMakeLists.txt

@@ -4,7 +4,7 @@ compile_gml(AboutDialog.gml AboutDialogGML.cpp)
 stringify_gml(DatePickerDialog.gml DatePickerDialogGML.h date_picker_dialog_gml)
 stringify_gml(EmojiInputDialog.gml EmojiInputDialogGML.h emoji_input_dialog_gml)
 stringify_gml(FontPickerDialog.gml FontPickerDialogGML.h font_picker_dialog_gml)
-stringify_gml(FilePickerDialog.gml FilePickerDialogGML.h file_picker_dialog_gml)
+compile_gml(FilePickerDialog.gml FilePickerDialogGML.cpp)
 stringify_gml(IncrementalSearchBanner.gml IncrementalSearchBannerGML.h incremental_search_banner_gml)
 compile_gml(PasswordInputDialog.gml PasswordInputDialogGML.cpp)
 
@@ -50,6 +50,7 @@ set(SOURCES
     Event.cpp
     FileIconProvider.cpp
     FilePicker.cpp
+    FilePickerDialogGML.cpp
     FileSystemModel.cpp
     FilteringProxyModel.cpp
     FontPicker.cpp
@@ -150,7 +151,6 @@ set(GENERATED_SOURCES
     ../../Services/WindowServer/WindowServerEndpoint.h
     DatePickerDialogGML.h
     EmojiInputDialogGML.h
-    FilePickerDialogGML.h
     FontPickerDialogGML.h
     IncrementalSearchBannerGML.h
 )