Tables across the dashboard work the same way, and other improvements

Fixes

• Creating a workspace with a name that’s too long or contains a tab now says what’s wrong with the name, instead of creating the workspace without a name.
• A workspace can no longer be renamed to nothing, or to a name made only of spaces, which left a blank name in the sidebar. A name that’s turned down comes with a message saying why, rather than a generic error.
• Dragging content onto a folder on the Content page lights up the whole folder, so you can see where it will land.

Improvements

• Workspace names can be as short as 1 character, so a company called X can call its workspace X.
• Tables across the dashboard share one look and behave the same way: status columns use the same badges, previews and page controls match, and sorting, search, and paging work alike in every table.