Merge branch 'develop' into 'master'

Fix a bug in image clipboard.

See merge request !53
3 jobs for master in 6 minutes and 2 seconds (queued for 4 minutes and 43 seconds)
Status Job ID Name Coverage
  Build
passed #216936028
build-appimage

00:04:23

passed #216936027
build-flatpak

00:03:21

 
  External
passed continuous-integration/appveyor/branch