Use comphelper::getProcessComponentContext()

The context in the mxContext member does not seem to be usable for
what we need it for here. Using what
comphelper::getProcessComponentContext() returns works better. Let's
hope it has no unintended side-effects.

This likely makes the mxContext member unused, but I did not bother
removing it yet, to keep this commit minimal.

Change-Id: Ic048683b066af7952e2e84b03ea306e7daaba259
Reviewed-on: https://gerrit.libreoffice.org/68592
Tested-by: Jenkins
Reviewed-by: Tor Lillqvist <tml@collabora.com>

vbahelper/source/vbahelper/vbacommandbarhelper.cxx

@@ -28,6 +28,7 @@
 #include <com/sun/star/ui/UIElementType.hpp>
 #include <com/sun/star/ui/theWindowStateConfiguration.hpp>
 #include <comphelper/random.hxx>
+#include <comphelper/processfactory.hxx>
 #include <vbahelper/vbahelper.hxx>
 #include <rtl/ustrbuf.hxx>
 #include <sal/log.hxx>
@@ -110,12 +111,13 @@ void VbaCommandBarHelper::Init( )
         throw uno::RuntimeException( "Not implemented" );
     }
 
+    css::uno::Reference< css::uno::XComponentContext > xContext(comphelper::getProcessComponentContext());
     css::uno::Reference< css::ui::XModuleUIConfigurationManagerSupplier > xUICfgMgrSupp(
-        css::ui::theModuleUIConfigurationManagerSupplier::get(mxContext) );
+        css::ui::theModuleUIConfigurationManagerSupplier::get( xContext ) );
 
     m_xAppCfgMgr.set( xUICfgMgrSupp->getUIConfigurationManager( maModuleId ), uno::UNO_QUERY_THROW );
 
-    css::uno::Reference< css::container::XNameAccess > xNameAccess = css::ui::theWindowStateConfiguration::get( mxContext );
+    css::uno::Reference< css::container::XNameAccess > xNameAccess = css::ui::theWindowStateConfiguration::get( xContext );
 
     m_xWindowState.set( xNameAccess->getByName( maModuleId ), uno::UNO_QUERY_THROW );
 }