D27934: KCM/Kwinoptions: Port focus tab to KConfigXT

meven created this revision.
meven added reviewers: ervin, bport, hchain, crossi.
Herald added a project: KWin.
Herald added a subscriber: kwin.
meven requested review of this revision.

REVISION SUMMARY
  - remove singleton of KWinOptionsSettings
  
  Depends on D27477 <https://phabricator.kde.org/D27477>

TEST PLAN
  - No functional change
  - default / reset button work as expected.

REPOSITORY
  R108 KWin

BRANCH
  windows2

REVISION DETAIL
  https://phabricator.kde.org/D27934

AFFECTED FILES
  kcmkwin/kwinoptions/focus.ui
  kcmkwin/kwinoptions/kwinoptions_settings.kcfg
  kcmkwin/kwinoptions/kwinoptions_settings.kcfgc
  kcmkwin/kwinoptions/main.cpp
  kcmkwin/kwinoptions/main.h
  kcmkwin/kwinoptions/mouse.cpp
  kcmkwin/kwinoptions/mouse.h
  kcmkwin/kwinoptions/windows.cpp
  kcmkwin/kwinoptions/windows.h

To: meven, ervin, bport, hchain, crossi
Cc: kwin, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart