Seamless link sharing via drag&drop upload on the tray icon

Moving a file onto the tray icon could directly put it into Nextcloud (either root folder or a specific folder like Auto upload), sync it and copy the share link in the clipboard.
This could be a possible nice bonus feature for the desktop client. Some others who do it are [CloudUp](https://cloudup.com/), [Jumpshare](https://jumpshare.com/), [Droplr](https://droplr.com/), and formerly CloudApp.

Jumpshare:
CloudUp:

Articles on it back from 2012 and 2013
- https://www.labnol.org/software/drag-drop-share-files/28234/
- https://macdrifter.com/2012/10/cloudapp-and-droplr.html
- Possibly relevant Stackoverflow: https://stackoverflow.com/questions/5663887/drag-and-drop-with-nsstatusitem/6493240#6493240

Ref as mentioned in https://github.com/nextcloud/desktop/issues/877

What do you think @tobiasKaminsky?