Show a notification if some of the paths are skipped during a drag&drop.

Related to #10544
2 jobs for notif-skipped in 8 minutes and 27 seconds (queued for 5 seconds)
latest
Status Job ID Name Coverage
  Test
passed #22094
code-quality

00:06:17

3.0%
 
  Build
passed #22095
linux

00:02:09