D24515: don't allow to resize or move fullscreen windows

mart created this revision.
mart added a reviewer: Plasma.
Herald added a project: KWin.
Herald added a subscriber: kwin.
mart requested review of this revision.

REVISION SUMMARY
  add the same check of the Client class: if a window
  is fullscreen, is not movable nor resizable

TEST PLAN
  Doesn't have any visible regression over normal usage,
  this partially tackles a bug that can be seen in plasma mobile:
  if the placement is "maximizing", then asking windows to be
  shown as fullscreen has no effect and they will always be shown as a normal
  maximized window.
  
  this now doesn't happen anymore.. most of the times,
   as there must be some race condition
  as a concause of the problem

REPOSITORY
  R108 KWin

BRANCH
  phab/fullscreen

REVISION DETAIL
  https://phabricator.kde.org/D24515

AFFECTED FILES
  shell_client.cpp

To: mart, #plasma
Cc: kwin, LeGast00n, The-Feren-OS-Dev, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, mart