Merge pull request #57 from skrustev/update-cellmerging-17.2

Update Cell Merging sample regarding the new options changes. Merge 17.2

Author: Konstantin Dinev

HTMLSamples/grid/cell-merging.html

@@ -77,7 +77,7 @@
                     },
                     {
                         name: "CellMerging",
-                        initialState: "merged"
+                        mergeOn: "always"
                     },
                     {
                         name: "Sorting",