Improve status bar support in menus.

Extend syntax of most menu items to accept ‘--status’ argument.
Fix status bar updates when opening menus and moving between items.
Draw multi-line status bar with word wrapping.
Add ‘--numeric’ option to field items.

Currently equivalent to ‘--integer’ (allow any numeric input), but
‘--integer’ may be later redefined to allow only integer input.
Fix menu transparency.

Allow full-screen menus to be transparent. Only draw top menu layer
regardless of transparency.
Add ‘style’ menu script keyword.

Allow compact style to be explicitly specified for menu. Transparent
menus are now full-screen by default.
Make player setup menu fit lower resolutions.