This will be used to solve issues around style_set:
if the widget is legacy or pure eo we may need to select a different
style. So in the constructor we need to know whether we are legacy or
eo. Note that calling style_set in finalize only is too late as we would
lose information such as efl_text_set() called inside efl_add().
Summary:
elm_bg was supposed to be used only in legacy,
but since we need a common object to be used as a background of widgets,
it is now renamed as efl_ui_bg and supports EO APIs.
Reviewers: cedric, jpeg, woohyun
Differential Revision: https://phab.enlightenment.org/D5147
Jean-Philippe Andre
Lukasz Stanislawski
Marcel Hollerbach
Sungtaek Hong