* util/options.cpp: Added option types for single and multiple paths.
* util/options.cpp: Substitute environment variables in values from defaults and INI files.
* ui/dirmenu.cpp: Removed hard-coded list of multi-path options.
* plugins: Don't substitute environment variables in path options.
Trying to collect messages from everything at once hits some limit in
xgettext and causes messages to be lost no, so I've split it up by the
second-level source directories.
For some reason xgettext thinks overloaded Lua functions are blasphemy,
so that has to be worked around, too.
* frontend: Added support for message context to localisations.
* frontend: Added string_view versions of the message lookup functions.
* frontend: Added a few more folder options to the internal UI.
* emu/softlist.cpp: Use more appropriate containers.
* Switched to Python 3 by default - this will become a requirement.
* Updated msgfmt.py for message context support.
* frontend: Show all software item info in the internal UI.
* frontend: Search alternate titles in software selection menu.
* 3rdparty/utf8proc: Updated to v2.6.1 (has several fixes).
* frontend: Added software filters for common info fields.
* frontend: Allow UI manager to hold onto persistent session data.
* frontend: Cache software lists for eight machines.
* frontend: Added support for loading localised system names.
* frontend: Add UI for selecting localised system names.
* Fix console history path, homepath is a core option
* Create missing directories recursively in lua plugins.
* Add lfs to global environment in a less magical way.
require normally doesn't bind the name globally just returns the
module, mame sets a preloader that does bind lfs globally, but
maybe it's less surprising to do it explicitly
Made the sound manager mute controls readable, and got rid of system
enable since it just controls system mute anyway. This was causing
confusion: phantom2 was trying to use both independentlyt casuing the
mute bit to be ignored.
THe Lua interface changes are mostly changing methods to properties,
some renames to make things clearer, and some additional properties for
better control over snapshots.
