D18410: Implement PlasmaShellSurface::popupBehavior in kwin

davidedmundson created this revision.
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REVISION SUMMARY
  Allows a plasma surface to stay on top. Primary use case is the "pin"
  icon in the plasma calendar/system tray.
  
  FIXED-IN: 5.16.0
  BUG: 400317

TEST PLAN
  Relevant unit test + set/unset pin in calendar

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D18410

AFFECTED FILES
  autotests/integration/plasma_surface_test.cpp
  shell_client.cpp

To: davidedmundson, #kwin
Cc: kwin, jraleigh, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, ngraham, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart