* migrate macOS client to using tr_sessionLoadTorrents
With this PR the macOS client now loads torrents at startup using `tr_sessionLoadTorrents`
The history file is used in tandem to provide macOS specific additions
Add a getter/setter for torrent announce URLs as text that can be copied
and pasted: one URL per line, with a blank line between tiers.
C API: tr_torrentGetTrackerList() and tr_torrentSetTrackerList()
RPC APi: `trackerList` in `torrent-get` and `torrent-set`.
This deprecates `trackerAdd`, `trackerRemove`, and `trackerEdit`
from the RPC API.
* refactor: prefer constexpr over enum for GUI_PAD values
* refactor: prefer constexpr over enum for PrefsDialog values
* refactor: prefer constexpr over enum for StatsDialog values
* refactor: use enum class for GtrUnicode types
* refactor: prefer constexpr over enum for BT peer msg codes
* refactor: use enum class for TrMakemetaResult
* refactor: prefer constexpr over enum for BT metadata message types
* refactor: use enum class for AwaitingBt
* refactor: use enum class for EncryptionPreference
* refactor: use enum class for TrFormat in rpcimpl
* refactor: prefer constexpr over enum for QApp intervals
* refactor: prefer constexpr over enum for tr_resume bitfields
* refactor: prefer constexpr over enum for Qt/TrFileModel bitfields
* refactor: remove obsolete TODO comment in announce-list
Previously was calculated by number of bytes downloaded, which caused
edge cases when those two numbers were not the same, e.g. if the user
already had part of the torrent from another source and only downloaded
a small part. When this happened, the ratio could be very large and use
of seedratio would behave in a way that most people would not expect.
Note, the old behavior has been around for a VERY LONG TIME. Even though
this is a bugfix, it does change semantics. I don't think there is any
third-party code that depends on the old behavior but this is arguably
a breaking change.
Use SF Symbols on macOS 11+
Use NSSegmentedControl instead of custom view.
Add NSImage extension to fallback loading from
assets on macOS 10.15 and older.
Also should fix sizing issues when changing pane from Options
to Files.
Fixes#2247
