tdf#104105: fix Vcl lifecycle in CondFormat (reportdesign)

Avoid this error:
Window ( 7VclVBox()) with live children destroyed:  N5rptui9ConditionE() * n

by calling disposeAndClear on each element of m_aConditions
m_aConditions is Conditions type
Conditions type is ::std::vector< VclPtr<Condition> >
See http://opengrok.libreoffice.org/xref/core/reportdesign/source/ui/inc/CondFormat.hxx#70

Change-Id: Ie99f8cdb5acd787892237787525d79f3231689db
Reviewed-on: https://gerrit.libreoffice.org/31775
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
(cherry picked from commit 73131fc3806ce2a7da61c93590e467e5b044c341)
Reviewed-on: https://gerrit.libreoffice.org/31779
Tested-by: Julien Nabet <serval2412@yahoo.fr>
diff --git a/reportdesign/source/ui/dlg/CondFormat.cxx b/reportdesign/source/ui/dlg/CondFormat.cxx
index da28331..5f398ff 100644
--- a/reportdesign/source/ui/dlg/CondFormat.cxx
+++ b/reportdesign/source/ui/dlg/CondFormat.cxx
@@ -134,6 +134,12 @@ namespace rptui

    void ConditionalFormattingDialog::dispose()
    {

        for (auto i = m_aConditions.begin(); i != m_aConditions.end(); ++i)
        {
            i->disposeAndClear();
        }

        m_aConditions.clear();
        m_pConditionPlayground.clear();
        m_pScrollWindow.clear();
@@ -190,7 +196,6 @@ namespace rptui
            Reference< XFormatCondition > xCond = m_xCopy->createFormatCondition();
            ::comphelper::copyProperties(m_xCopy.get(),xCond.get());
            m_xCopy->insertByIndex( _nNewCondIndex, makeAny( xCond ) );

            VclPtrInstance<Condition> pCon( m_pConditionPlayground, *this, m_rController );
            pCon->setCondition( xCond );
            pCon->reorderWithinParent(_nNewCondIndex);