aim: look at last enemy origin when just loosed focus

fix: saving bot practice took enormous amount of time when changing level on large practice database
refactor: changed random number generator usage

inc/graph.h

@@ -317,7 +317,7 @@ public:
 
    // get the random node on map
    int32_t random () const {
-      return rg.get (0, length () - 1);
+      return rg (0, length () - 1);
    }
 
    // check if has editor