Fix Windows NSIS installer process

Author: MartinHelmut

packaging/CMakeLists.txt

@@ -13,6 +13,7 @@ set(CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_PROJECT_VERSION_MAJOR})
 set(CPACK_PACKAGE_VERSION_MINOR ${CMAKE_PROJECT_VERSION_MINOR})
 set(CPACK_PACKAGE_VERSION_PATCH ${CMAKE_PROJECT_VERSION_PATCH})
 set(CPACK_VERBATIM_VARIABLES YES)
+set(CPACK_MONOLITHIC_INSTALL TRUE)
 
 # Package resources
 set(CPACK_RESOURCE_FILE_WELCOME ${CMAKE_CURRENT_LIST_DIR}/Welcome.txt)

src/app/App/Main.cpp

@@ -1,3 +1,5 @@
+#define SDL_MAIN_HANDLED
+
 #include <exception>
 
 #include "Core/Application.hpp"