efl: mark selectable stable

Summary:
fixes T7871
fixes T7852

This also works arround a eolian issue where composites do not mark the
inherited API from the composites as implemented.

Reviewers: SanghyeonLee, cedric, segfaultxavi, zmike

Reviewed By: segfaultxavi

Subscribers: SanghyeonLee, cedric

Tags: #efl

Maniphest Tasks: T7871, T7852

Differential Revision: https://phab.enlightenment.org/D10184

src/lib/elementary/efl_ui_collection_view.eo

@@ -1,11 +1,9 @@
 class Efl.Ui.Collection_View extends Efl.Ui.Layout_Base implements
                 Efl.Ui.Layout_Orientable,
-                Efl.Ui.Selectable,
-                Efl.Ui.Multi_Selectable_Async,
                 Efl.Ui.Focus.Manager_Sub,
                 Efl.Ui.Widget_Focus_Manager,
                 Efl.Ui.Item_Clickable
-    composites Efl.Ui.Scrollable, Efl.Ui.Scrollbar, Efl.Ui.Multi_Selectable_Async
+    composites Efl.Ui.Scrollable, Efl.Ui.Scrollbar, Efl.Ui.Multi_Selectable_Async, Efl.Ui.Single_Selectable
 {
    [[This widget displays a list of items in an arrangement controlled by an external @.position_manager
      object. By using different @.position_manager objects this widget can show unidimensional lists or

src/lib/elementary/efl_ui_selectable.eo

@@ -1,4 +1,4 @@
-interface @beta Efl.Ui.Selectable {
+interface Efl.Ui.Selectable {
   [[Selectable interface for UI objects
 
     An object implementing this interface can be selected.

src/lib/elementary/efl_ui_single_selectable.eo

@@ -1,4 +1,4 @@
-interface @beta Efl.Ui.Single_Selectable {
+interface Efl.Ui.Single_Selectable {
    [[Interface for getting access to a single selected item in the implementor.
 
      The implementor is free to allow a specific number of selectables being selected or not.