search and replace: keep last search field or preset by workflow step.

A client requested that the "Search In" field is always preset with "Target text" but the users are mostly needing it in column "Source text".

Possible solution: Either save last used value (similar to saving the state of the grid as requested in the road map) or preset according to the workflow step. Assuing that proofreader will search in the target and translators in the source column.

For Replace I assume Target is fine, since Source is mostly read-only.