fix selection text colour in dark theme
fix selection text colour in dark theme

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