message: Add event list context menu item for setting markers
diff: @@ -2133,6 +2133,25 @@ bool TraceWin::events_list_render_popupmenu( uint32_t eventid )
  m_graph.do_start_timestr = true;
  }
  + if ( ImGui::BeginMenu( "Set Marker" ) )
  + {
  + for ( size_t i = 0; i < ARRAY_SIZE( m_graph.ts_markers ); i++ )
  + {
  + ImGui::PushID( i );
  +
  + char marker_label[ 2 ];
  +
  + marker_label[ 0 ] = char( 'A' + i );
  + marker_label[ 1 ] = 0;
  + if ( ImGui::MenuItem( marker_label ) )
  + graph_marker_set( i, event.ts );
  +
  + ImGui::PopID();
  + }
  +
  + ImGui::EndMenu();
  + }
  +
  #if 0
  label = string_format( "Set Time Offset to %s", ts_to_timestr( event.ts ).c_str() );
  if ( ImGui::MenuItem( label.c_str() ) )
  