Board-specific hint for board version of Net Settings.

Fixes https://gitlab.com/kicad/code/kicad/issues/13630

common/dialogs/dialog_assign_netclass.cpp

@@ -52,6 +52,9 @@ DIALOG_ASSIGN_NETCLASS::DIALOG_ASSIGN_NETCLASS( EDA_BASE_FRAME* aParent, const w
     m_matchingNets->SetFont( KIUI::GetInfoFont( this ) );
     m_info->SetFont( KIUI::GetInfoFont( this ).Italic() );
 
+    if( aParent->GetFrameType() == FRAME_PCB_EDITOR )
+        m_info->SetLabel( wxT( "Note: complete netclass assignments can be edited in Board Setup > Project." ) );
+
     SetupStandardButtons();
 
     finishDialogSettings();