elm_index: disable indicator when the selected item is unselected

Summary:
in current code, indicator is disabled only when mouse up event happens.
if the selected item is unselected through API before mouse up,
the indicator will remain active while no item is selected (highlighted).

Test Plan: None

Reviewers: Hermet, seoz, raster

Reviewed By: raster

Differential Revision: https://phab.enlightenment.org/D560

legacy/elementary/src/lib/elm_index.c

@@ -1235,6 +1235,9 @@ elm_index_item_selected_set(Elm_Object_Item *it,
 
         edje_object_signal_emit(VIEW(it_inactive), "elm,state,inactive", "elm");
         edje_object_message_signal_process(VIEW(it_inactive));
+
+        // for the case in which the selected item is unselected before mouse up
+        elm_layout_signal_emit(obj, "elm,indicator,state,inactive", "elm");
      }
 }