message: Don't draw locate circle when mouse is outside viewport.
diff: @@ -685,6 +685,7 @@ export class ToolAdmin {
  IModelApp.notifications.clearToolTip();
  this.cursorView = undefined;
  this.setOverlayDecoration(vp);
  + vp.invalidateDecorations(); // stop drawing locate circle...
  }
  /** @hidden */
  