Originally, it was just a wrapper for libtorrent::torrent_handle class, so it mimicked its name.
It was then transformed into a more complex aggregate, but the name was retained (just by inertia).
Unlike libtorrent::torrent_handle class in whose name "handle" means the pattern used,
it does not matter for qBittorrent classes and just eats up space in the source code.
Move files/folders renaming functions to core classes.
Query file/folder for renaming by its current path.
Add ability to rename content folders from WebAPI/WebUI.
Always store firstLastPiecePriority in resume data.
Don't recalculate firstLastPiecePriority value each time it is accessed.
Always store sequentialDownload in resume data as native libtorrent field.
"private" subfolders violate the structure of the project,
since the existence of all other subfolders is based on a
different principle.
In addition, there is no clear line between "private" and
"non private".
