RFPL-2691: Tests for Autocomplete custom layput fixed
Page fragment for rich:editor added.

Only type method is working. There is also a preparation for referencing
editor buttons easily.
RFPL-2691: Showcase: Tests for Editor autosaving example fixed

Rewritten to Graphene 2 and also the test for autosave of editor
implemented.
RFPL-2691: Showcase fixing tests for editor Advanced configuration

Rewriten to Graphene2, also implemented test for auto focusing the
editor's textarea.