performer-poster-backdrop: compatibility with Stash v0.31.1#703

DogmaDragon merged 3 commits intostashapp:mainstashapp/CommunityScripts:mainfrom

Stash-KennyG:fix/performer-poster-backdrop-stash-v0.31.1Stash-KennyG/CommunityScripts:fix/performer-poster-backdrop-stash-v0.31.1Copy head branch name to clipboard