tdf#99537 set expand for re-used sidebar panels

When re-using a panel, reset the expand state from the stored
state in the PanelContexDescriptor.

Change-Id: I00851982bbd36cacdc57459bb6e5be9fcc719e81
Reviewed-on: https://gerrit.libreoffice.org/43466Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Yousuf Philips <philipz85@hotmail.com>
Tested-by: Yousuf Philips <philipz85@hotmail.com>
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

sfx2/source/sidebar/SidebarController.cxx

@@ -617,6 +617,7 @@ void SidebarController::CreatePanels(const ::rtl::OUString& rDeckId, const Conte
         if (pPanel != nullptr)
         {
             aNewPanels[nWriteIndex] = pPanel;
+            pPanel->SetExpanded( rPanelContexDescriptor.mbIsInitiallyVisible );
             ++nWriteIndex;
         }
         else