1111d33532 refactor: Make MessageBoxFlags enum underlying type unsigned (MarcoFalke)
Pull request description:
All values in the enum are unsigned. Also, flags shouldn't be treated as signed types. So clarify the underlying type and remove a sanitizer suppression.
ACKs for top commit:
hebasto:
ACK 1111d33532, I have reviewed the code and it looks OK, I agree it can be merged.
Tree-SHA512: 48b16c4a0ace1a1e4d351d6eadadbb1bc42aef7fd82e24e3ea50c62f2c04a552ed21027158d09aa97e630c8c7d732cb150c38065333d7c2accbae46593b7ed9f