* Eeschema: fix incorrect display of the page number in a complex hierarchy.

When, inside a complex hierarchy, one switch from an instance of a sheet to an other instance of this sheet,
the page number shown in the worksheet was not updated on screen, and the initial number was displayed.

Fix from master branch.

eeschema/hierarch.cpp

@@ -303,5 +303,5 @@ void SCH_EDIT_FRAME::DisplayCurrentSheet()
 
     UpdateTitle();
 
-    GetCanvas()->Refresh();
+    HardRedraw();   // Ensure any item has its view updated, especially the worksheet items
 }