D16688: SessionManager: Close all split views before session restore

[loh tar]

loh.tar created this revision.
loh.tar added a reviewer: Kate.
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REVISION SUMMARY
  They are not properly handled and cause various trouble up to a
  complete missing view

TEST PLAN
  - Create & save a session with three horizontal splits
  - Switch to an other session with no split view
  
  > Looks good or bad? In my case was the view completely gone, only the plugins to see
  
  - Switch back to the first session
  
  > Looks also bad, not again three splitter
  
  This patch is more a workaround than a solution of the core problem which should reside in  KateViewManager::restoreSplitter, but I noticed that too late to dig into it, current solution works here good enough :-)

REPOSITORY
  R40 Kate

REVISION DETAIL
  https://phabricator.kde.org/D16688

AFFECTED FILES
  kate/session/katesessionmanager.cpp

To: loh.tar, #kate
Cc: kwrite-devel, #kate, michaelh, ngraham, demsking, cullmann, sars, dhaumann
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