Also implement markup_set/get for:
- Efl.Ui.Frame
- Efl.Ui.Slider
Users may choose between text_set/get and markup_set/get, depending on
whether they want to escape their text or not.
This moves the API entry points from Widget to Layout parts. I don't
think the other widgets support translation, but that is easy to fix.
The actual code implementation remains in elm_widget.c.
Legacy-only widgets are covered by Part_Legacy, while all EO widgets
that have text inherit from Layout (except Win but I don't think the
window title was translatable in legacy).
This removes 2/3 remaining part APIs from Widget.
Ref T5363
This is VERY tricky.
For legacy, just create an internal class that has both. It's easier
this way. For parts that are handled by Layout directly, we know from
Edje which type to return.
For EO objects we should know from the part name which kind of part we
are dealing with:
- text (overridden by the widget)
- content (overridden by the widget)
- special (new efl_part based functions)
- generic (handled by Layout)
Note: Efl.Ui.Slider was handling "span size" on ALL parts. That's bad...
This is now limited to "span" only.