* Added Griddragger.
* Refactored the GridDragger to match FW style
Unit tests, Test UI and documentation to come next.
* Change DropMode to BETWEEN and add Test UIs
* Simplify GridDragger API
* Fixes and unit tests for GridDragger
Fixed issues regarding drop index calculation when sourche and target grid is the same.
When the ListDataProvider is not internally using List, always drops to the end.
Updates the old data provider instead of creating a new one to preserve filters&sorting.
LegacyApplication explicitly uses "reindeer" as default theme.
Extended AbstractTestUI to AbstractReindeerTestUI, that all old tests now inherit.
All new tests should be based on AbstractTestUI.
Also added AbstractReindeerTestUIWithLog for those that needed it.
Removed all found @Theme("valo") and used proper parent test class.
Change-Id: I0bb45850f3f1d39c6f78dac35dfa08acbad427ad