[INTERNAL] sap.m.Table: fix scrolling issue when sticky is enabled
[INTERNAL] sap.m.Table: fix scrolling issue when sticky is enabled

When the Window zoom is greater than 100%, this caused unexpected
scrolling of the page when the first item in the list is focused. To
avoid this the focused item top value is rounded.
BCP: 1880415463

Change-Id: Id3f346390ed4a2ed9c17b93ed6d03e1a70915fc4

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5