Enhance createPopup() API to support key callback

Enhance createPopup() API to support key callback

[Issue#]   N/A
[Problem]  A web page underneath pop-up moves to the previous page when user expects the pop-up closed.
           This happens when a user select back-key when the permission request pop-up is on the screen.
[Cause]    Permission request pop-up does not handle the key callback.
           Moreover, the key event (which is not consumed) is passed onto the webview evas_object.
           As a result, the default behavior (i.e. dispatch tizenhwkey event) happens.
[Solution] Add key callback handler to popup evas_object.
           Destory popup and pass "deny" to webkit that waits permission request result,
           when Back-key event callback is called.

[SCMRequest] Needed by https://review.tizendev.org/gerrit/#/c/88381/

[Remarks] Implementation details
    * CertificateSupportUtil::createPopup extend an argument to receive key callback.
      (Evas_Smart_Cb keyCallback)
    * Add "EVAS_CALLBACK_DEL" callback to remove before popup is removed.
      This behavior will prevent crash.
      Sometimes ecore dispatch event which is in the queue even callback data is already released.

Change-Id: I48b09e85db36da9f9ca27a38e7a08ed27b29cbbc