Add back in room alias extraction directly from the url, as this broke when trying to join some rooms.
Add back in room alias extraction directly from the url, as this broke when trying to join some rooms.

williamboman/matrix-angular-sdk,matrix-org/matrix-angular-sdk,matrix-org/matrix-angular-sdk,matrix-org/matrix-angular-sdk,williamboman/matrix-angular-sdk,williamboman/matrix-angular-sdk