Suppress wxWidgets popups when locale can't be loaded for some reason

Fixes https://gitlab.com/kicad/code/kicad/-/issues/13371

common/pgm_base.cpp

@@ -611,6 +611,9 @@ COMMON_SETTINGS* PGM_BASE::GetCommonSettings() const
 
 bool PGM_BASE::SetLanguage( wxString& aErrMsg, bool first_time )
 {
+    // Suppress wxWidgets error popups if locale is not found
+    wxLogNull doNotLog;
+
     if( first_time )
     {
         setLanguageId( wxLANGUAGE_DEFAULT );