QtIFW

Doc: update documentation for dynamicpage example

Fix issues in the example files.
Use the same values in all config.xml files to be able
to use a standard text to describe them.

Change-Id: I3a6dae58270906f590cde0c6e234d9bbb75d34f7
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>