Fix in graphics engine which was kind of running in batch mode

App/src/main.cpp

@@ -50,9 +50,9 @@ int main(int argc, char **argv)
     if( !command_line_options.isConsistent() ) return 0;
 
     // holding graphics if it exists
-    if( gApplication ) {
+    if( theApp ) {
         std::cout << "main() -> Info. Holding graphics, press ctrl-C to exit..." << std::endl;
-        gApplication->Run();
+        theApp->Run();
     }
 
     return 0;