D18503: Keep _NET_DESKTOP_NAMES in sync for existing desktops

zzag created this revision.
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REVISION SUMMARY
  We have to connect to nameChanged even if m_rootInfo is not set yet,
  otherwise desktop names in _NET_DESKTOP_NAMES won't be kept in sync.
  
  CCBUG: 403307

REPOSITORY
  R108 KWin

BRANCH
  foobar

REVISION DETAIL
  https://phabricator.kde.org/D18503

AFFECTED FILES
  virtualdesktops.cpp

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