Condense .mx_RoomTile_avatar properties
Condense .mx_RoomTile_avatar properties

Looks like the develop->experimental merge duplicated the definition. We'll take the best of both and make it work.
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