reduce the amount of senseless exceptions during document load

Change-Id: If9d0a0539002c013f077b8fb692de4c29ca032b7
Reviewed-on: https://gerrit.libreoffice.org/64791
Tested-by: Jenkins
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

framework/source/uielement/menubarmanager.cxx

@@ -1453,7 +1453,7 @@ void MenuBarManager::FillMenu(
                         aProp[i].Value >>= bEnabled;
                 }
 
-                if (vcl::CommandInfoProvider::IsExperimental(aCommandURL, rModuleIdentifier) &&
+                if (!aCommandURL.isEmpty() && vcl::CommandInfoProvider::IsExperimental(aCommandURL, rModuleIdentifier) &&
                     !SvtMiscOptions().IsExperimentalMode())
                 {
                     continue;

framework/source/uielement/toolbarmanager.cxx

@@ -1009,7 +1009,7 @@ void ToolBarManager::FillToolbar( const Reference< XIndexAccess >& rItemContaine
                         aProp[i].Value >>= nStyle;
                 }
 
-                if (vcl::CommandInfoProvider::IsExperimental(aCommandURL, m_aModuleIdentifier) &&
+                if (!aCommandURL.isEmpty() && vcl::CommandInfoProvider::IsExperimental(aCommandURL, m_aModuleIdentifier) &&
                     !SvtMiscOptions().IsExperimentalMode())
                 {
                     continue;

vcl/source/helper/commandinfoprovider.cxx

@@ -194,7 +194,7 @@ static Sequence<beans::PropertyValue> GetCommandProperties(const OUString& rsCom
         {
             Reference<container::XNameAccess> xNameAccess(GetCommandDescription());
             Reference<container::XNameAccess> xUICommandLabels;
-            if (xNameAccess->getByName(rsModuleName) >>= xUICommandLabels)
+            if ((xNameAccess->getByName(rsModuleName) >>= xUICommandLabels) && xUICommandLabels->hasByName(rsCommandName))
                 xUICommandLabels->getByName(rsCommandName) >>= aProperties;
         }
     }