Ui.Scroll_Manager: restrict to Efl.Ui.Pan type for 'pan' property

Summary:
The implementation calls efl_ui_pan_xxx on what was assumed to be any
Efl.Canvas.Object. This changes the type to be Efl.Ui.Pan.

Also, reordered headers due to the introduced dependency.

Reviewers: devilhorns, Hermet

Reviewed By: Hermet

Subscribers: cedric, #committers, zmike

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6536

src/lib/elementary/Elementary.h

@@ -340,10 +340,10 @@ typedef Eo Efl_Ui_Focus_Manager;
 # include <efl_ui_view_list_relayout.eo.h>
 # include <efl_ui_view_list.eo.h>
 # include <efl_ui_view_list_pan.eo.h>
+# include <efl_ui_pan.eo.h>
 # include <efl_ui_scroll_manager.eo.h>
 # include <efl_ui_scroller.eo.h>
 # include <efl_ui_dnd_types.eot.h>
-# include <efl_ui_pan.eo.h>
 # include <efl_selection.eo.h>
 # include <efl_ui_dnd.eo.h>
 # include <efl_ui_dnd_container.eo.h>

src/lib/elementary/efl_ui_scroll_manager.eo

@@ -17,7 +17,7 @@ class Efl.Ui.Scroll.Manager (Efl.Object,
          set {
          }
          values {
-            pan: Efl.Canvas.Object @nullable; [[Pan object]]
+            pan: Efl.Ui.Pan @nullable; [[Pan object]]
          }
       }
    }