[pull] master from beyond-all-reason:master - #219

…9181)

Three fixes in the in-game keybind editor: a first run that leaves you
with almost no keybinds, a save dialog that quietly renumbers the name
you typed, and key capture that binds the fake meta key to itself.

Profiles now always write a fakemeta line, `none` included, because
unbindall leaves the engine's fake meta key alone and a profile that
named none was picking up whatever the last one set.

AI disclosure: written with assistance from Claude Code.

## Work done

The spec replaced VFS.ZlibDecompress with an identity function at file scope and never restored it. Busted runs every spec file in one Lua state and sorts the file list, so spec/luaui/Include/mission_options_spec.lua ran after it with the helper's ZlibCompress paired against the _identity_ ZlibDecompress, and every decode returned nil.

Encode through the helper's ZlibCompress and drop the override.