message: Add time to previous event in event list
diff: @@ -1515,7 +1515,15 @@ void TraceWin::render_events_list( CIniFile &inifile )
  ImGui::NextColumn();
  - // $TODO mikesart: Add string for time delta to the previous event.
  + ts_str += "ms";
  + if ( event.id > 0 )
  + {
  + const trace_event_t &event0 = get_event( event.id - 1 );
  +
  + // Add time delta from previous event
  + ts_str += " (+" + ts_to_timestr( event.ts - event0.ts, 0, 4 ) + ")";
  + }
  +
  ImGui::Text( "%s", ts_str.c_str() );
  ImGui::NextColumn();
  ImGui::Text( "%s (%u)", event.comm, event.cpu );
  