Add global shortcut
Summary:
The "Tools" key is function key in some laptops. In ThinkPad + Windows, when you press that key, it will open Control Panel or Windows 10 Settings. But in Linux, it does nothing. So I think it can be a good shortcut for System Settings because no other software use it.
Reviewers: Plasma, mart
Reviewed By: Plasma, mart
Subscribers: ngraham, davidre, ognarb, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D29625