Converted TorrentTableView from older style cell based table to more modern view based
* floating group rows are now used for an improved groups experience
* individual group indicators are hidden when _Use Groups_ is selected to minimize visual clutter (see #3328 )
* removed negated `usesAlternatingRowBackgroundColors` flag for minimal view in Controller.mm (personal preference - easy to restore)
* Move jsonsl to third-party
This treats it as proper 3rd-party code to which our warning and style
settings don't extend.
* Move wildmat to third-party
This treats it as proper 3rd-party code to which our warning and style
settings don't extend.
* Fixup Xcode project to match new project structure
* refactor: make tr_peer_socket.type private
* refactor: reimplement tr_peerIo::address() as a wrapper around tr_peer_socket::address()
* refactor: remove tr_address, tr_port from tr_peerIo
* refactor: replace tr_netClosePeerSocket() with tr_peer_socket::close()
* refactor: rename state enum type as tr_port_forwarding_state
* chore: use snake_case for tr_shared struct fields
* refactor: replace tr_shared with tr_port_forwarding
* refactor: make tr_natpmp_state an enum class
* refactor: uniform naming for port-forwarding module
* refactor: move output-only parameters in tr_natpmp::pulse() to return struct
* fix: use a nullptr multicastif if bindaddr is empty
* chore: use PascalCase for enum class values
* chore: clean up port-forwarding #includes
* chore: remove unused tr_port_forwarding::peerPort()
* Use std::unique_ptr to manage UDP core object
N.B.: it's no longer valid to call socket adjustments quirks from
tr_sessionSetUTPEnabled() because the corresponding object may be
not created yet. We have to create (or re-create) it explicitly
(like it's done in tr_sessionSetDHTEnabled()) or just set
is_utp_enabled_ flag of the session and assume that socket
adjustments will be done later when the object is constructed.
