tdf#107593 Show the cursor after header/footer delete

Change-Id: I978f088fa700791d48a5a65392f980822ac14bd2
Reviewed-on: https://gerrit.libreoffice.org/69032
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <tietze.heiko@gmail.com>

sw/source/uibase/docvw/HeaderFooterWin.cxx

@@ -443,6 +443,9 @@ void SwHeaderFooterWin::ExecuteCommand(const OString& rIdent)
     else if (rIdent == "delete")
     {
         rSh.ChangeHeaderOrFooter( rStyleName, m_bIsHeader, false, true );
+        if ( IsEmptyHeaderFooter() )
+            rSh.ToggleHeaderFooterEdit();
+        GrabFocusToDocument();
     }
     else if (rIdent == "insert_pagenumber")
     {