Fix regression that was introduced by a mismatch in the default value of ActiveMouseScreen option between kwin.kcfg and kwinoptions_settings.kcfg BUG: 424389 (cherry picked from commit c853f8313a213a0f7d0f98f662f7e98849d547ca)
Summary: * remove singleton of KWinOptionsSettings Depends on D27477 Test Plan: * No functional change * default / reset button work as expected. Reviewers: ervin, bport, hchain, crossi, #kwin, zzag Reviewed By: ervin, #kwin, zzag Subscribers: zzag, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D27934
Test Plan: Behavior unchanged Reviewers: ervin, #kwin, zzag Reviewed By: #kwin, zzag Subscribers: zzag, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D27164