Allow to enforce case insensitive filenames

⚠️ This issue respects the following points: ⚠️ • This is a bug, not a question or a configuration/webserver/proxy issue. • This issue is not already reported on [Github]( OR [Nextcloud Community Forum]( _(I've searched it)_. • Nextcloud Server is up to date. See [Maintenance and Release Schedule]( for supported versions. • I agree to follow Nextcloud's [Code of Conduct]( Bug description due to a case sensitivity on the server, it'll accept one version over another, soft locking the desktop from downloading or merging the files. example: Misc vs MISC both can co exist in the server rather than being merged or aggregated Steps to reproduce 1. client A creates a folder with an upper case name 2. client B creates a folder with a camel case name 3. desktop app will only download one due to OS restrictions, some file merging may be present but files will not be visible to the desktop client ![image]( Expected behavior …