Read-O-Matic 1.2.15

A transfer reads a copy of the book map taken before it starts. A highlight made while the copy runs stays on the UI map. A sidecar on disk still wins over the copy.

Assets: readomatic-1.2.15.tar.xz, readomatic_1.2.15-1_amd64.deb, Read-O-Matic-1.2.15-x86_64.AppImage.