Cross-check against new marketing pages for platforms and targets support

qtcarol is working on new www.qt.io pages (https://projects.invisionapp.com/share/G7T7PV7SUNA#/screens/376392099/comments) with similar data as on this page. Cross-check for compliancy and possible conflicting data.

Note that this is Qt 5.14 and 2019H2 specific task but there is a larger need to e.g. pull this data from a maintained database for both www.pages and documentation needs.