After posting my first feature request on this forum, thought I'd say Drafft has been wonderful to use to collab with friends on games. Thanks for all the effort around designing and maintaining it.
Anyway, on long file names, when a file is locked, there is no way of knowing this unless clicked into. Ideally, I'd like to unlock files when I close Drafft so that others can edit the files (or I can edit them on different machines), so having some sort of icon both beside the file name in the section list as well as tab would be a helpful indicator (image attached to show where I mean).