show_content_view() should show the content view
show_content_view() should show the content view

The name of the method implies that show_all() will be called on the
widget, so let's do that.

[endlessm/eos-sdk#2060]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib