The methods for checking if qBittorrent is set as the standard application for opening torrent files and magnet links and setting qBittorrent as the standard application for those is using deprecated methods now. For example `LSCopyDefaultHandlerForURLScheme` and `kUTTagClassFilenameExtension`.
The new methods have been moved to `macutilities.mm` because in `os.cpp` cocoa couldn't be imported.
PR #23059.
* Use correct pointer type in NSIS scripts
* Only remove qbt specific registry keys when uninstalling or disassociating
* Set .torrent Content Type when associating .torrent format
* Move ".torrent association" functions to Utils::OS class
PR #19709.