[effects/dimscreen] Use QSet for checking whether activated window asks for permissions
Summary:
Do not construct QStringList with classes of windows that ask for
permissions. Instead, create a static set of those window classes (to
avoid the unnecessary construction of QStringList and make lookups
faster).
Reviewers: KWin, davidedmundson
Reviewed By: KWin, davidedmundson
Subscribers: kwin
Tags: KWin
Differential Revision: https://phabricator.kde.org/D13440