Make "edit-none" a symlink to "dialog-cancel"
Summary:
A "disable" icon better represents "none" and then we don't have two cross icons with different colors.
Test Plan: Search for edit-none in Cuttlefish.
Reviewers: VDG, ndavis
Reviewed By: VDG, ndavis
Subscribers: kde-frameworks-devel, VDG
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D22855