Prevent paste in screen locker
KScreenlocker tries to clear the clipboard on load. However, klipper
also (by default) automatically keeps the last relevant item in the
clipboard. Whilst both parts independently work correctly, Plasma as a
whole does not.
This became a problem when we added the reveal password button as it is
a data leak.
Instead of clearing the clipboard this patch replaces it with a real
entry, but with a dummy mime value that is of no value to anyone,
especially a textfield.
Made this patch
Tried pasting in session
Reviewers: Plasma, mart
Reviewed By: mart
Subscribers: mart, graesslin, plasma-devel
Differential Revision: https://phabricator.kde.org/D14924