Allow "plain text" toggle on preview pane for all small files
Right now, the preview pane on the site will refuse to display plain text files unless the file extension is one of a short list of types. However, there's no good reason why this files can't be displayed. There's no need to try to syntax-highlight the files, just display the contents.
Since the site won't necessarily know if a file with an obscure extension is a plain text file or not, all files below a certain reasonable length in bytes should have a toggle checkbox in the preview pane ("Display raw contents" or something) that would force the file to be displayed as plain text. It would be a safe enough assumption to guess that the files are encoded with UTF8.
I know similar reasonable suggestions to merely add more supported extensions (e.g., .log) have been posted before and ignored. I'm making a broader request here because this is something I run into every day.