Guard against race when waiting for cross-signing to be ready
Guard against race when waiting for cross-signing to be ready

Check to see if cross-signing is already set up after a verification
is done to make sure it doesn't race and we end up waiting forever.

matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk