A small technical update which introduces 'Big UI' video option and makes the game more likely to run on some older/odd setups.

- [misc] Better errors reporting (useful if you have an odd/old/rare setup and encounter some problems).
- [misc] Better handling in case of rare/old setups.

- [interface] 'Big UI' video option (Options/Video) which rescales the screen and make everything big, useful for high resolution monitors (it's the old experimental mode rescale UI option but improved).
- [interface] Beautified map scaling.