Go to System settings → Shortcuts → Global shortcuts. The list in which to select the component is not read-only. I.o.w. double-clicking in the list or pressing F2 lets the user rename items. I first noticed it in Plasma 5.8, but 5.9 is also affected.
Git commit cafc7d5a448a19047762af3eb0d5e5a495ef58ad by Christoph Feck. Committed on 02/03/2017 at 23:21. Pushed by cfeck into branch 'Plasma/5.8'. Disable editing of 'Global Shortcuts' component names FIXED-IN: 5.9.4 Differential Revision: https://phabricator.kde.org/D4905 M +3 -0 kcms/keys/kglobalshortcutseditor.ui https://commits.kde.org/plasma-desktop/cafc7d5a448a19047762af3eb0d5e5a495ef58ad