Verify Column width after all sort related cell changes (#16597)

This fixes an IE8 issue where multisorting is not shown correctly.

Change-Id: Id68103f06baf9e3ae20cb2714407b467829ef1a0

client/src/com/vaadin/client/widgets/Grid.java

 
             if (SortDirection.ASCENDING == sortingOrder.getDirection()) {
                 cellElement.addClassName("sort-asc");
-                if (!sortedBefore) {
-                    verifyColumnWidth(column);
-                }
             } else {
                 cellElement.addClassName("sort-desc");
-                if (!sortedBefore) {
-                    verifyColumnWidth(column);
-                }
             }
 
             int sortIndex = Grid.this.getSortOrder().indexOf(sortingOrder);
                 cellElement.setAttribute("sort-order",
                         String.valueOf(sortIndex + 1));
             }
+
+            if (!sortedBefore) {
+                verifyColumnWidth(column);
+            }
         }
 
         /**