Prevent broadcasts to gain xlsx formula import performance boost

oox import filter was spending a lot of time in ScFormulaCell::Notify()
because of unnecessary broadcasts.
Now the oox import filter will use the same approach
that the xml import filter uses to prevent this from happening which
results in shorter import time.

Change-Id: I65e86919f352de0b22916a8d57d3166af0a58984

sc/source/filter/oox/workbookhelper.cxx

@@ -553,6 +553,10 @@ void WorkbookGlobals::initialize( bool bWorkbookFile )
         //! TODO: localize progress bar text
         mxProgressBar.reset( new SegmentProgressBar( mrBaseFilter.getStatusIndicator(), CREATE_OUSTRING( "Loading..." ) ) );
         mxFmlaParser.reset( new FormulaParser( *this ) );
+
+        //prevent unnecessary broadcasts and "half way listeners" as
+        //is done in ScDocShell::BeforeXMLLoading() for ods
+        getScDocument().SetInsertingFromOtherDoc(true);
     }
     else if( mrBaseFilter.isExportFilter() )
     {
@@ -604,6 +608,10 @@ void WorkbookGlobals::finalize()
         aPropSet.setProperty( PROP_IsChangeReadOnlyEnabled, false );
         // #111099# open forms in alive mode (has no effect, if no controls in document)
         aPropSet.setProperty( PROP_ApplyFormDesignMode, false );
+
+        //stop preventing establishment of listeners as is done in
+        //ScDocShell::AfterXMLLoading() for ods
+        getScDocument().SetInsertingFromOtherDoc(false);
     }
 }