The Dummy Button removal

The Dummy Button removal

[Issue]        N/A
[Problem]      WebView team managed to extract Evas_Object from
               ewk_view smart object. This object can be focused
               and unfocused, so The Dummy Button - proxy widget is
               not needed anymore
[Solution]     Delete The Dummy Button, add support for extracted
               Evas_Object.
[Verify]       Open any website, check if focus is working as
               intended.

Change-Id: Idf388056f1c6be494f76b5d36fef0be6bcef4556