fix: unsubscribe should remove the correct subscriber every time#12

ca-d merged 2 commits intoopenscd:mainopenscd/oscd-editor:mainfrom

stee-re:fix_unsubscribe-not-reliably-unsubscribingstee-re/oscd-editor:fix_unsubscribe-not-reliably-unsubscribingCopy head branch name to clipboard