message: Drop alpha level for system cpu graph events
diff: @@ -1466,6 +1466,7 @@ void TraceEvents::update_tgid_colors()
  for ( uint32_t idx : *plocs )
  {
  uint32_t hashval;
  + float alpha = label_alpha;
  size_t len = ( size_t )-1;
  trace_event_t &sched_switch = m_events[ idx ];
  const char *prev_comm = get_event_field_val( sched_switch, "prev_comm" );
  @@ -1482,12 +1483,15 @@ void TraceEvents::update_tgid_colors()
  len = 10;
  if ( len != ( size_t )-1 )
  + {
  sched_switch.flags |= TRACE_FLAG_SCHED_SWITCH_SYSTEM_EVENT;
  + alpha = 0.3f;
  + }
  hashval = fnv_hashstr32( prev_comm, len );
  sched_switch.flags |= TRACE_FLAG_AUTOGEN_COLOR;
  - sched_switch.color = imgui_col_from_hashval( hashval, label_sat, label_alpha );
  + sched_switch.color = imgui_col_from_hashval( hashval, label_sat, alpha );
  }
  }
  }
  