We'll replace this primarily with per-realm quotas (plus the simple
per-file limit of settings.MAX_FILE_UPLOAD_SIZE, 25 MiB by default).
We do want per-user quotas too, but they'll need some more management
apparatus around them so an admin has a practical way to set them
differently for different users. And the error handling in this
existing code is rather confused. Just clear this feature out
entirely for now; then we'll build the per-realm version more cleanly,
and then we can later add back per-realm quotas modelled after that.
The migration to actually remove the field is in a subsequent commit.
Based in part on work by Vishnu Ks (hackerkid).
This sets the column width of the upload table actions and size
columns to always be 75 so that the buttons are always in the same
line and take up the least amount of space possible with that
constraint.
This moves the stuff that should not scroll with the table such as the
search box and tips so it is moved out to be above the
`.progressive-table-wrapper` element.