Motivation / Problem

FiosList class is a wrapper around std::vector with some compatibility methods added to support the old SmallVector-style callers. This is legacy and not necessary.

Description

This change removes the crufty helpers, makes FiosList directly inherit of std::vector, and use the native std::vector methods and range iteratoers.

Limitations

There is one section that should be a range iterator, but it seems not to work via "this".

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, gs_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker