Show muted style when no time has been estimated for an adviser
Show muted style when no time has been estimated for an adviser

This uses the pattern found elsewhere on the work order to show a
slightly muted colour for text when there is nothing estimated yet.

uktrade/data-hub-fe-beta2,uktrade/data-hub-frontend,uktrade/data-hub-fe-beta2,uktrade/data-hub-frontend,uktrade/data-hub-frontend