FIX: Fix focus stealing from printer disconnection

Every time one of the connected printers disconnects, the
the old code would try to set the keyboard focus to the "Device" tab,
leading to a number of, either, focus stealing events, or notifications
if the desktop has focus stealing prevention (like GNOME).

Disable the focus setting on Linux to prevent that focus stealing.

See https://github.com/bambulab/BambuStudio/pull/5891#issuecomment-2635143655

src/slic3r/GUI/StatusPanel.cpp

@@ -4255,7 +4255,9 @@ void StatusPanel::set_default()
     m_ams_control_box->Hide();
     m_ams_control->Reset();
     error_info_reset();
+#ifndef __WXGTK__
     SetFocus();
+#endif
 }
 
 void StatusPanel::show_status(int status)