name self-chats by displayname if possible rather than mxid, and name empty-chats as 'Empty room' rather than the fugly '?'
name self-chats by displayname if possible rather than mxid, and name empty-chats as 'Empty room' rather than the fugly '?'

matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,williamboman/matrix-js-sdk,williamboman/matrix-js-sdk,krombel/matrix-js-sdk,krombel/matrix-js-sdk,williamboman/matrix-js-sdk