Resolves: tdf#138417 crash on customize sidebar

Change-Id: Icbb08b44e7f8729704d8278378a259fecb9bee4d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/106974
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/sfx2/source/sidebar/SidebarController.cxx b/sfx2/source/sidebar/SidebarController.cxx
index 35fbdf4..231524d 100644
--- a/sfx2/source/sidebar/SidebarController.cxx
+++ b/sfx2/source/sidebar/SidebarController.cxx
@@ -1180,6 +1180,7 @@ IMPL_LINK(SidebarController, OnSubMenuItemSelected, const OString&, rCurItemId, 
                                            IsDocumentReadOnly(),
                                            mxFrame->getController());
                // Notify the tab bar about the updated set of decks.
                maFocusManager.Clear();
                mpTabBar->SetDecks(aDecks);
                mpTabBar->HighlightDeck(mpCurrentDeck->GetId());
                mpTabBar->UpdateFocusManager(maFocusManager);