The description says the " code will insert a simple interactive map ... with the ability to maximize it by either double-clicking the map or clicking the icon in the right corner". I find that the map maximizes on a single click. I see this behaviour for the examples on this help page and on the English language wiki.
However, if you edit the pages and use show preview the maps behave as described, with the single click gaining focus and allowing the map to be used interactively within the page. The correct behaviour is also seen on the test2 wiki.