tdf#155526 Restore status bar for moving average

Previous commit	dc03f59374d4fc74dd44ddedc903bb9c00a74bb7 broke text in
status bar when a moving average trend line is selected

Change-Id: I259fb9aee1eccf9fac93038c6dd2755490769f88
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153677
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
(cherry picked from commit 125b0f6609332523d30bef600979b698c2d216f8)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153706
(cherry picked from commit 2e04c00f21cf2566c3de34d9dd828cc1615329fd)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153839
diff --git a/chart2/source/controller/dialogs/ObjectNameProvider.cxx b/chart2/source/controller/dialogs/ObjectNameProvider.cxx
index ab00276..ffd2bf7 100644
--- a/chart2/source/controller/dialogs/ObjectNameProvider.cxx
+++ b/chart2/source/controller/dialogs/ObjectNameProvider.cxx
@@ -597,33 +597,41 @@ OUString ObjectNameProvider::getHelpText( std::u16string_view rObjectCID, const 
                            if ( !(xEqProp->getPropertyValue( "YName") >>= aYName) )
                                aYName = "f(x)";
                        }
                        xCalculator->setRegressionProperties(aDegree, bForceIntercept, aInterceptValue, 2, aMovingType);
                        xCalculator->setRegressionProperties(aDegree, bForceIntercept, aInterceptValue, aPeriod, aMovingType);
                        xCalculator->setXYNames ( aXName, aYName );
                        RegressionCurveHelper::initializeCurveCalculator( xCalculator, xSeries, xChartModel );

                        // replace formula
                        OUString aWildcard = "%FORMULA";
                        sal_Int32 nIndex = aRet.indexOf( aWildcard );
                        if( nIndex != -1 )
                        // change text for Moving Average
                        if ( RegressionCurveHelper::getRegressionType( xCurve ) == SvxChartRegress::MovingAverage )
                        {
                            OUString aFormula ( xCalculator->getRepresentation() );
                            if ( cDecSeparator != '.' )
                            {
                                aFormula = aFormula.replace( '.', cDecSeparator );
                            }
                            aRet = aRet.replaceAt( nIndex, aWildcard.getLength(), aFormula );
                            aRet = xCalculator->getRepresentation();
                        }

                        // replace r^2
                        aWildcard = "%RSQUARED";
                        nIndex = aRet.indexOf( aWildcard );
                        if( nIndex != -1 )
                        else
                        {
                            double fR( xCalculator->getCorrelationCoefficient());
                            aRet = aRet.replaceAt(
                                nIndex, aWildcard.getLength(),
                                ::rtl::math::doubleToUString(
                                    fR*fR, rtl_math_StringFormat_G, 4, cDecSeparator, true ));
                            // replace formula
                            OUString aWildcard = "%FORMULA";
                            sal_Int32 nIndex = aRet.indexOf( aWildcard );
                            if( nIndex != -1 )
                            {
                                OUString aFormula ( xCalculator->getRepresentation() );
                                if ( cDecSeparator != '.' )
                                {
                                    aFormula = aFormula.replace( '.', cDecSeparator );
                                }
                                aRet = aRet.replaceAt( nIndex, aWildcard.getLength(), aFormula );
                            }

                            // replace r^2
                            aWildcard = "%RSQUARED";
                            nIndex = aRet.indexOf( aWildcard );
                            if( nIndex != -1 )
                            {
                                double fR( xCalculator->getCorrelationCoefficient());
                                aRet = aRet.replaceAt(
                                    nIndex, aWildcard.getLength(),
                                    ::rtl::math::doubleToUString(
                                        fR*fR, rtl_math_StringFormat_G, 4, cDecSeparator, true ));
                            }
                        }
                    }
                    catch( const uno::Exception & )