popup guide buffer if super key sequence was inputed

If `guide-key/popup-if-super-key-sequence` was a non-nil value, guide buffer is poped up when super key sequence is inputed.

For example, guide buffer is poped up when:

* `guide-key/guide-key-sequence` include `\C-h`
* input `\C-h4`
* `guide-key/popup-if-super-key-sequence` was a non-nil value