I have upgraded to 17.10 but I am frustrated that I am unable to drag a file say, from Files to a text editor that is minimised. In older versions I was able to drag it to the sidebar, hover over the application and it would open. Is there a way to get this to work in 17.10?
As an alternative, if you enable top left hotcorner for activities, drag a file there, then drag it above the application, wait for it to activate, drop your file
You can enable it with:
Unfortunately this feature is not yet implemented in Dash to Dock extension (Ubuntu dock, the sidebar in Ubuntu 17.10 onwards, is a fork of Dash to Dock). According to the developer of the extension