Refresh track & via net names after netlist update

Fixes: lp:1749411
* https://bugs.launchpad.net/kicad/+bug/1749411

pcbnew/dialogs/dialog_update_pcb.cpp

@@ -37,6 +37,7 @@
 #include <class_drawpanel.h>
 #include <class_board.h>
 #include <ratsnest_data.h>
+#include <view/view.h>
 
 #include <functional>
 using namespace std::placeholders;
@@ -113,6 +114,13 @@ void DIALOG_UPDATE_PCB::PerformUpdate( bool aDryRun )
     m_frame->SetCurItem( NULL );
     m_frame->SetMsgPanel( board );
 
+    // Update rendered tracks and vias net labels
+    auto view = m_frame->GetGalCanvas()->GetView();
+
+    // TODO is there a way to extract information about which nets were modified?
+    for( auto track : board->Tracks() )
+        view->Update( track );
+
     std::vector<MODULE*> newFootprints = updater.GetAddedComponents();
 
     // Spread new footprints.

pcbnew/netlist.cpp

@@ -169,6 +169,10 @@ void PCB_EDIT_FRAME::ReadPcbNetlist( const wxString& aNetlistFileName,
     // Rebuild the board connectivity:
     board->GetConnectivity()->Build( board );
 
+    // TODO is there a way to extract information about which nets were modified?
+    for( auto track : board->Tracks() )
+        view->Update( track );
+
     SetMsgPanel( board );
     m_canvas->Refresh();
 }