The grid-item-metadata* component always used :will-be-deleted-at (falling
back to :modified-at) and always showed the "Will be deleted %s" tooltip,
even for files in the Recent tab that have no deletion date.
Now the component branches on the presence of :will-be-deleted-at:
- Deleted files: show the deletion timeago with the existing
"Will be deleted %s" tooltip.
- Regular files: show :modified-at timeago with a new
"Last modified %s" tooltip key (dashboard.grid.last-modified-at).
Closes#10873
Co-authored-by: Andrey Antukh <niwi@niwi.nz>
d745dc4a3c