tdf#92732: fix vclptr lifecycle for index entry editing dialog

Call SwViewShell::SetCareWin() in closeHdl instead of d'tor
since with care window set the d'tor is never called

Reviewed-on: https://gerrit.libreoffice.org/18330Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
(cherry picked from commit 51ac2bf2)

Change-Id: Ieb8280ab57c3bccf95ce2ce96937aab261133ce0
Reviewed-on: https://gerrit.libreoffice.org/18333Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sw/source/ui/index/swuiidxmrk.cxx

@@ -621,6 +621,7 @@ IMPL_LINK_NOARG(SwIndexMarkPane, CloseHdl)
     }
     else
     {
+        SwViewShell::SetCareWin( 0 );
         m_rDialog.EndDialog(RET_CANCEL);
     }
     return 0;
@@ -930,7 +931,6 @@ IMPL_LINK( SwIndexMarkPane, KeyDCBModifyHdl, ComboBox *, pBox )
 SwIndexMarkPane::~SwIndexMarkPane()
 {
     delete pTOXMgr;
-    SwViewShell::SetCareWin( 0 );
 }
 
 void    SwIndexMarkPane::ReInitDlg(SwWrtShell& rWrtShell, SwTOXMark* pCurTOXMark)