ignore a local-folder instead of un checking sync - avoid deleting localfolders

I don't expect much traction here given this has been a known issue/feature request for some time. Still the moderator at the forum requested I make an issue based on the work around I provided there. Rather than repeat all the details I refer you to the forum post.

The feature request is to make the current folder check box work in a different way. Have it ignore a folder for syncing instead (as I do now but adding it to ignore list). If one wants the current functionality you just allow it to sync first then uncheck it to "unlink" it. Then if the **user!** decides they can then delete those local files/folders knowing that a copy is in the cloud.

https://help.nextcloud.com/t/ignore-a-local-folder-instead-of-un-checking-sync-avoid-deleting-local-folders/45044