message: Check for escape key to cancel loading trace events
diff: @@ -2207,7 +2207,7 @@ bool TraceWin::render()
  ImGui::Text( "%s events %u...", loading ? "Loading" : "Initializing", eventsloaded & ~0x40000000 );
  - if ( ImGui::Button( "Cancel" ) )
  + if ( ImGui::Button( "Cancel" ) || s_keybd().is_escape_down() )
  m_loader.cancel_load_file();
  ImGui::End();
  