Moves code signing from the release-tool to CMake and unifies the Windows-equivalent code.
Also bump minimum CMake release
* Use C++17 when using MSVC compiler * Remove unneeded header files and macros * Removed unnecessary Yubikey cmake file * Enhance release tool * Updated INSTALL.md
* Resolves #764 * Add libqrencode and qtsvg dependencies * Ensure QR code remains square * Auto-close QR code dialog when database is locked * Add databaseLocked() Signal to databaseWidget * Correct otpauth URI output in Totp::writeSettings(...)
