Maybe I am overlooking this, but I can't find the option 'Dynamic Link'.
This option was available in SF 3.7 under 'Navigation'.
This way you could easily insert an image and make the image link to e.g. an internal page.
I now solved it using a Content Block, but I prefer the Dynamic Link as a widget.
The link you provided is broken. Is there an updated link? I'm working on migrating a site from 3.7 to 5.2 which uses the DynamicHyperLink control throughout the site. Thanks!
There is a section "Controls" in our new documentation that you can find here. So you need a control and a property where you type the pageId.
the Telerik team