resetScreen = (screen) => {
    // Xterm also resets the color palette on soft reset, even though it doesn't
    // seem to be documented anywhere.
    screen.textAttributes.reset();
    screen.textAttributes.colorPaletteOverrides = [];
    screen.saveCursorAndState(this.vt);
  }
Soft terminal reset.

Perform a soft reset to the default values listed in
http://www.vt100.net/docs/vt510-rm/DECSTR#T5-9