desktop-ui: fix ws orientation after savestate load at boot

WonderSwan and WonderSwan Color could boot with
the screen rotated incorrectly when loading a savestate during startup
(using `--save-state`).
Reapply the PPU/Screen/Orientation setting after unserializing a state
so the screen rotation matches the restored orientation.

desktop-ui/program/states.cpp

@@ -34,6 +34,14 @@ auto Program::stateLoad(u32 slot) -> bool {
   if(!memory.empty()) {
     serializer state{memory.data(), (u32)memory.size()};
     if(emulator->root->unserialize(state)) {
+      if(emulator->name == "WonderSwan" || emulator->name == "WonderSwan Color") {
+        if(auto orientation = emulator->root->find<ares::Node::Setting::String>("PPU/Screen/Orientation")) {
+          auto value = orientation->value();
+          orientation->setValue(value);
+          orientation->modify(value);
+        }
+      }
+
       showMessage({"Loaded state from slot ", slot});
       return true;
     }