TODO:
1) add move rows after scrolled
2) test. refs #556
added move rows after scroll. refs #556
added tests. refs #556
compatibility fix with current HOT (#556)
* some improvements: render one move handler for all row headers (similar to row resize)

* bug fixing (selected row after clicked on move handler, not working persistent state after change row positions -> incorrect localStorage key manualRowPostions)

* fixed failure test

refs #556
* merged column & row move demos. refs #556
update title
remove redundant demo
Merge branch 'feature/issue-556' into develop