UI: Add Selected and Hidden Array Values

Add Selected and Hidden Array Values

Let developers get and set whether items in an editable list are hidden
or selected. May be useful in when editable lists are modified and
handled in a callback. Especially when edit button callbacks are used.

Closes obsproject/obs-studio#1200

UI/properties-view.cpp

@@ -576,6 +576,10 @@ void OBSPropertiesView::AddEditableList(obs_property_t *prop,
 	for (size_t i = 0; i < count; i++) {
 		obs_data_t *item = obs_data_array_item(array, i);
 		list->addItem(QT_UTF8(obs_data_get_string(item, "value")));
+		list->setItemSelected(list->item((int)i),
+				obs_data_get_bool(item, "selected"));
+		list->setItemHidden(list->item((int)i),
+				obs_data_get_bool(item, "hidden"));
 		obs_data_release(item);
 	}
 
@@ -1690,7 +1694,10 @@ void WidgetInfo::EditableListChanged()
 		obs_data_t *arrayItem = obs_data_create();
 		obs_data_set_string(arrayItem, "value",
 				QT_TO_UTF8(item->text()));
-
+		obs_data_set_bool(arrayItem, "selected",
+			item->isSelected());
+		obs_data_set_bool(arrayItem, "hidden",
+			item->isHidden());
 		obs_data_array_push_back(array, arrayItem);
 		obs_data_release(arrayItem);
 	}