SaveState: Show warning on old / long use state.

Using save states instead of in game saves causes bugs in games, and
preserves bugs from bad settings and old PPSSPP versions.

This tells users when they might be affected.

UI/PauseScreen.cpp

@@ -238,9 +238,9 @@ void SaveSlotView::Draw(UIContext &dc) {
 	UI::LinearLayout::Draw(dc);
 }
 
-static void AfterSaveStateAction(bool status, const std::string &message, void *) {
+static void AfterSaveStateAction(SaveState::Status status, const std::string &message, void *) {
 	if (!message.empty()) {
-		osm.Show(message, 2.0);
+		osm.Show(message, status == SaveState::Status::SUCCESS ? 2.0 : 5.0);
 	}
 }
 
@@ -373,7 +373,7 @@ void GamePauseScreen::dialogFinished(const Screen *dialog, DialogResult dr) {
 		ScreenshotViewScreen *s = (ScreenshotViewScreen *)dialog;
 		int slot = s->GetSlot();
 		g_Config.iCurrentStateSlot = slot;
-		SaveState::LoadSlot(gamePath_, slot, SaveState::Callback(), 0);
+		SaveState::LoadSlot(gamePath_, slot, &AfterSaveStateAction);
 
 		finishNextFrame_ = true;
 	} else {