FIX: [STUDIO-2825] ctrl + tab only switch main pages

Change-Id: I10ed43929e4b757fb7c5415ba23a78ded1f2c7d0
(cherry picked from commit 10983c4d177b772e8eda264e5a9957218f779435)

src/slic3r/GUI/Monitor.cpp

@@ -202,6 +202,7 @@ MonitorPanel::~MonitorPanel()
             auto title = m_tabpanel->GetPageText(m_tabpanel->GetSelection());
             m_media_file_panel->SwitchStorage(title == _L("SD Card"));
         }
+        page->SetFocus();
     }, m_tabpanel->GetId());
 
     //m_status_add_machine_panel = new AddMachinePanel(m_tabpanel);