D17227: [wayland] Check presence of the inhibit object when a client is registered in IdleInhibition

zzag created this revision.
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REVISION SUMMARY
  Some applications are not able to inhibit the idle behavior because
  each of them creates an inhibitor object before the corresponding
  ShellClient object becomes ready for painting.
  
  BUG: 401499
  FIXED-IN: 5.15.0

TEST PLAN
  idle-inhibit client (from wlroots/examples) works.

REPOSITORY
  R108 KWin

BRANCH
  fix-idle-inhibit

REVISION DETAIL
  https://phabricator.kde.org/D17227

AFFECTED FILES
  autotests/integration/idle_inhibition_test.cpp
  idle_inhibition.cpp

To: zzag, #kwin
Cc: kwin, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart