nyx: utilize ini free and fix various memleaks

With the new changes the heap and heap node usage drops 95% on boot. Subsequent accesses to Launch/More config keep the counter the same.

nyx/nyx_gui/config.c

@@ -169,6 +169,8 @@ int create_config_entry()
 				break;
 			}
 		}
+
+		ini_free(&ini_sections);
 	}
 
 	f_close(&fp);