[DDW-303] Update 'About' dialog styling for Dark theme
[DDW-303] Update 'About' dialog styling for Dark theme

input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus