Tuning of bionic menu

- Locations of the parts of title are defined dynamically according to the text size;
- The description window is bigger (as requested in #4655) and showing only when it required (i.e. in examination mode);
- BORDER_COLOR instead of boring c_ltgray;
- Show "None" in bionic list when player doesn't have any bionics;

Some parts of the menu still require polishing (scrollbar, for example), but it can be done later.