Merge branch 'patch-1' into 'master'
org.kde.kdenlive.appdata.xml: add content_rating
See merge request kde/kdenlive!50
(cherry picked from commit dc2738820d6c2f4ebfd457707c1d847ac6a38e62)
7b2af9f0 org.kde.kdenlive.appdata.xml: add content_rating