Color picker does not close on Edge or FF60

When click on select or cancel, the color picker does not close automatically.

It happens on old FF and Edge.
FF60 is old so it's not really a problem.

I think this may fix the problem.

```
  _cancelPopUp(e) {
    this._contextMenu.close(); // close the contextmenu in old browser
    e.target.dispatchEvent(new CustomEvent('_closeColorPickerPopUp', {composed: true}));
  }
```