* perf: faster file tree building in GTK client
* perf: faster GTK client FileList
* use a std::map for faster node lookup when building a file tree
* use tr_get_mime_type_for_filename() for mime-type lookup
* remove unnecessary layer of indirection when building the
keys for lookuops in the mime-type icon cache
* be more careful to only call operator= on proxies whose values
have actually changed, since that assignment is expensive
* fix: add default case to switch statement
* fix: remove redundant static specifier
* fix: use std::optional.value_or
* fix: make type of variable pointer-to-const
* refactor: move log state into a struct
* refactor: make tr_peerMgr constructor explicit
* fix: make type of variable pointer-to-const
* fix: replace insert with try_emplace
* fix: implicit conversion may lose precision
* fix: use init-statement to reduce variable scope
* chore: mark unused return value with (void)
* fix: break will never be executed
* refactor: compile the name fallback string
* fix: replace redundant type with auto
* fix: use init-statement to reduce variable scope
* fix: implicit conversion loses precision
* fix: use in-class initializer
* fix: make variable a pointer-to-const
* fix: local variable name shadows class variable
* fix: implicit conversion may lose precision
* 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
* refactor: include <memory> when using shared_ptr or unique_ptr
* refactor: include <cstdio> iff we use it
* refactor: include <cstring> iff we use it
* refactor: include <cstdlib> iff we use it
* refactor: include <string_view> or <string> iff we use it
* refactor: include <array> iff we use it
* refactor: include <ctime> iff we use it
* refactor: include <cctype> iff we use it
* refactor: misc #include cleanups in libtransmission
* (C++) Macros should not be used to define constants
* (C++) Memory should not be managed manually
* (C++) "void*" should not be used in typedefs, member variables, function parameters or return type
* (C++) When the "Rule-of-Zero" is not applicable, the "Rule-of-Five" should be followed
* (C++) "switch" statements should have "default" clauses
* (C++) "explicit" should be used on single-parameter constructors and conversiosn operators
* (C++) Non-const global variables should not be used
