rename `size` prop as `fileSize`, add comments, and honour explicit properties rather than mxEvent fields
rename `size` prop as `fileSize`, add comments, and honour explicit properties rather than mxEvent fields

KentShikama/vector-web,vector-im/vector-web,martindale/vector,vector-im/riot-web,KentShikama/vector-web,KentShikama/vector-web,vector-im/vector-web,KentShikama/vector-web,martindale/vector,vector-im/riot-web,vector-im/riot-web,vector-im/riot-web,vector-im/riot-web,KentShikama/vector-web,vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,vector-im/vector-web,KentShikama/vector-web