Is your feature request related to a problem? Please describe.
When trying to preview files in editor, the extension only previews files with extensions that match a list case-sensitively.
Describe the solution you'd like
The extension should not be case-sensitive when checking file extensions.
Is your feature request related to a problem? Please describe. When trying to preview files in editor, the extension only previews files with extensions that match a list case-sensitively.
Describe the solution you'd like The extension should not be case-sensitive when checking file extensions.
Additional context Prompted by #57.