My understanding of the View Sent Form feature is that it is for enumerators and/or data managers to confirm which filled out forms were sent even if they were deleted.
In the case of filled out forms that are not deleted, the data can be reviewed but not edited. In the case of filled out forms that have been deleted, the crossed out eye icon is displayed and the row is not clickable.
The feature can be hidden from the main menu from Admin Settings > Main Menu Settings if you don't need it.
P.S.: The partially localized date and time stamp bothers me as well. Unfortunately, it's not a super simple fix. I have filed the issue at https://github.com/opendatakit/collect/issues/1419