Show an info message if some of the paths are skipped during a drag&drop.

Related to #10544
2 jobs for notif-skipped in 7 minutes and 20 seconds (queued for 32 seconds)
latest
Status Job ID Name Coverage
  Test
passed #22548
code-quality

00:05:09

3.0%
 
  Build
passed #22549
linux

00:02:10