general: rename CurrentProcess to ApplicationProcess

src/core/file_sys/savedata_factory.cpp

@@ -172,7 +172,7 @@ std::string SaveDataFactory::GetFullPath(Core::System& system, VirtualDir dir,
     // be interpreted as the title id of the current process.
     if (type == SaveDataType::SaveData || type == SaveDataType::DeviceSaveData) {
         if (title_id == 0) {
-            title_id = system.GetCurrentProcessProgramID();
+            title_id = system.GetApplicationProcessProgramID();
         }
     }