tdf#116264 Show added_buttons by default

Change-Id: Ia2d299fdc63d3f75ea0cdb9e9b6ca8340a63cd06
Reviewed-on: https://gerrit.libreoffice.org/50935Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

vcl/source/app/salvtables.cxx

@@ -448,6 +448,7 @@ public:
         VclButtonBox* pBox = m_xDialog->get_action_area();
         VclPtr<PushButton> xButton(VclPtr<PushButton>::Create(pBox, WB_CLIPCHILDREN|WB_CENTER|WB_VCENTER));
         xButton->SetText(rText);
+        xButton->Show();
         m_xDialog->add_button(xButton, nResponse, true);
     }
 

vcl/source/window/layout.cxx

@@ -2235,6 +2235,7 @@ void MessageDialog::create_message_area()
             case VclButtonsType::Cancel:
                 pBtn.set( VclPtr<CancelButton>::Create(pButtonBox) );
                 pBtn->SetStyle(pBtn->GetStyle() & WB_DEFBUTTON);
+                pBtn->Show();
                 pBtn->set_id("cancel");
                 add_button(pBtn, RET_CANCEL, true);
                 nDefaultResponse = RET_CANCEL;