[INTERNAL] sap.m.ListBase keyboard handling improvements

- Section navigation handling now respects old focus position.
- Now table header/footer allows to trigger select all/none.
- Select/deselect all handling is moved from LIB to LB.
- getFocusDomRef is implemented for List/Table
- Item focus remembering feature is added.
- Table test page is updated to show new features.

Change-Id: Ic4d600b6f95a8f4c3eef24c908157369492d3f06
Merge "[INTERNAL] sap.m.ListBase keyboard handling improvements"