Store: Make Retry download the listing again

It only recreated the views, which showed the same connection error.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

UI/Store.cpp

@@ -354,7 +354,12 @@ void ProductView::OnLaunchClick(UI::EventParams &e) {
 
 StoreScreen::StoreScreen() : UISimpleBaseDialogScreen(Path(), SimpleDialogFlags::Default) {
 	lang_ = g_Config.sLanguageIni;
+	StartListingDownload();
+}
+
+void StoreScreen::StartListingDownload() {
 	loading_ = true;
+	connectionError_ = false;
 
 	std::string indexPath = StoreBaseUrl() + "index.json";
 	const char *acceptMime = "application/json, */*; q=0.8";
@@ -532,6 +537,7 @@ void StoreScreen::OnGameLaunch(UI::EventParams &e) {
 }
 
 void StoreScreen::OnRetry(UI::EventParams &e) {
+	StartListingDownload();
 	RecreateViews();
 }