Fix broken links in UI doc article
Fix broken links in UI doc article

"Widgets" and "Page" links were outdated.

Change-Id: I18dd345eee80e8377cf5a4c8095a9faff7e79a90

mkostikov/tabris-js,eclipsesource/tabris-js,moham3d/tabris-js,pimaxdev/tabris,moham3d/tabris-js,eclipsesource/tabris-js,pimaxdev/tabris,mkostikov/tabris-js,eclipsesource/tabris-js