Media: Fix visual issues in media library grid view.

Populate the uploading progress bar visual naming element. Provides a nominal accessibility improvement, in that long uploads can be found and recognized during the upload process. Fix an alignment issue in the bulk select button. Follow up to [61757].

Props siliconforks, presskopp, ozgursar, joedolson.
Fixes #64883.

git-svn-id: https://develop.svn.wordpress.org/trunk@62104 602fd350-edb4-49c9-b593-d223f7449a82