Back and forth synch, newer version conflict option

### Is your feature request related to a problem? Please describe.

I'm using my nextcloud as a platform for my notes through third parties app (joplin/markor) on my phone and desktop. I can easily
edit a note on nextcloud browser, see it on my desktop, and the other way around. But this seems to be impossible with my phone.I need to go to the nextcloud app and manually synch. The nextcloud note app can do this but doesn't edit the md file somehow.

In trying to troubleshoot this, another frustrating point emerge.
The "envoie automatique" feature give only those conflict option : ask everytime, write over distant version, rename new version, ignore.

### Describe the solution you'd like
Any change to a folder (file editing, creation, deletion etc ...) reflected in the main nextcloud so it can arrive to other endpoint.

In the synch feature, we have a way to automatically choose the most recent version, with a prompt if both have been updated since last synch.

### Additional context
I thought I saw a similar request once but I can't find it anymore. Seems like it would be a crucial feature for many usages.