Please implement action "Cut" in project tree to support two-step moving of files between project subdirectories ("Cut", then "Paste"). Reproducible: Always
Patch here: https://phabricator.kde.org/D1955
This was committed (but sadly seems to have missed 5.2) https://cgit.kde.org/kdevelop.git/commit/?id=5c66f82d291e07f0c1a52e129a7255a7440c2698