Fix FCHost compile error on Linux

The Linux version of FCHost was unable to compile after CEF commit https://bitbucket.org/chromiumembedded/cef/commits/2ea7459a89fbdce77ffa319cf9986a84fd041709 changed the RunFileDialog behaviour, which made FCHost incompatible on Linux with CEF >100.0.23.

FCHost/fchost/fchost_handler_linux.cc

@@ -64,10 +64,6 @@ namespace {
 		}
 #endif
 
-		// kdialog does not support these
-		mode = static_cast<CefDialogHandler::FileDialogMode>(mode & ~(CefDialogHandler::FileDialogMode::FILE_DIALOG_OVERWRITEPROMPT_FLAG));
-		mode = static_cast<CefDialogHandler::FileDialogMode>(mode & ~(CefDialogHandler::FileDialogMode::FILE_DIALOG_HIDEREADONLY_FLAG));
-
 		switch (mode) {
 			case CefDialogHandler::FileDialogMode::FILE_DIALOG_OPEN_MULTIPLE:
 				cmdLine << " --multiple"; [[fallthrough]];
@@ -108,15 +104,7 @@ namespace {
 		const std::vector<CefString>& accept_filters)
 	{
 		std::ostringstream cmdLine;
-		cmdLine << "zenity --file-selection";
-
-		// zenity does not support these
-		mode = static_cast<CefDialogHandler::FileDialogMode>(mode & ~(CefDialogHandler::FileDialogMode::FILE_DIALOG_HIDEREADONLY_FLAG));
-
-		if (mode & CefDialogHandler::FileDialogMode::FILE_DIALOG_OVERWRITEPROMPT_FLAG) {
-			cmdLine << " --confirm-overwrite";
-		}
-		mode = static_cast<CefDialogHandler::FileDialogMode>(mode & ~(CefDialogHandler::FileDialogMode::FILE_DIALOG_OVERWRITEPROMPT_FLAG));
+		cmdLine << "zenity --file-selection --confirm-overwrite";
 
 		switch (mode) {
 			case CefDialogHandler::FileDialogMode::FILE_DIALOG_OPEN_MULTIPLE:
@@ -247,7 +235,7 @@ void FCHostHandler::PlatformTitleChange(CefRefPtr<CefBrowser> browser, const Cef
 
 bool FCHostHandler::OnFileDialog(CefRefPtr<CefBrowser> /* browser */, CefDialogHandler::FileDialogMode mode,
 		const CefString& title, const CefString& default_file_path, const std::vector<CefString>& accept_filters,
-		int /* selected_accept_filter */, CefRefPtr<CefFileDialogCallback> callback)
+		CefRefPtr<CefFileDialogCallback> callback)
 {
 	static DialogHelper helper;
 
@@ -262,6 +250,6 @@ bool FCHostHandler::OnFileDialog(CefRefPtr<CefBrowser> /* browser */, CefDialogH
 
 	std::vector<CefString> selected;
 	selected.push_back(fn);
-	callback->Continue(0, selected);
+	callback->Continue(selected);
 	return  true;
 }