Implemented scrolling disabling for ScrollView via ScrollOrientation.Neither (#3113)
* Added Neither option for ScrollOrientation to disable scrolling
Added UI-test for issue #2680
Made test more representative
Fixed comment it ui-test for #2680
Added tests for changing orientation in real-time
Updated unit test for asserting ScrollOrientation.Neither
Added test that content size didn't change when ScrollOrientation.Neither
Fixed issue when scroll event was fired if ScrollOrientation is Neither
* Renamed properties at test
* Fixed UI test
* Codestyle fixes