Display calibration status on device manager window

[izumin5210]

CALIBRATED status has removed on #58

[izumin5210]

  ui::Separator();
  ui::Columns(4, "Connected devices", true);
  float table_width = ui::GetWindowContentRegionWidth();
  ui::SetColumnOffset(1, table_width * 0.4f);
  ui::SetColumnOffset(2, table_width * 0.65f);
  ui::SetColumnOffset(3, table_width * 0.9f);
  ui::Text("serial");
  ui::NextColumn();
  ui::Text("state");
  ui::NextColumn();
  ui::Text("fps");
  ui::NextColumn();
  ui::Text("cal");
  ui::NextColumn();
  ui::Separator();