PNG Images not shown

[kevinmlewis]

I have some files that are named with a capitol PNG extension they do not show up in the editor, I get the message "The file cannot be displayed in the editor because it is either binary, very large or uses an unsupported text encoding". If the file extension is lowercase png then the file shows up in the editor. Changing the file from uppercase to lowercase also fixes the issue.

This used to work before the editor was opensourced.