[Cuttlefish] Make it clear that picker mode still works
Summary:
The alternative strings were lost in the quick controls 2 overhaul. Also fixes a
small bug that caused "edit-copy" to be copied to the clipboard everytime when
triggered from the context menu.
Test Plan: Enable plugin in Kate see the changed strings.
Reviewers: Plasma, cblack, ngraham, davidedmundson
Reviewed By: Plasma, davidedmundson
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D25806