Only show filename and not any folders.

src/main.cpp

@@ -207,9 +207,7 @@ bool MainApp::OnCmdLineParsed(wxCmdLineParser& parser)
         
         // On Linux/macOS, this replaces $HOME with "~" to shorten the title a bit.
         wxFileName fn(configPath);        
-        fn.ReplaceEnvVariable("HOME", "~");
-        
-        customConfigFileName = fn.GetShortPath();
+        customConfigFileName = fn.GetFullName();
     }
     pConfig->SetRecordDefaults();