The full screen mode is not always preserved

Steps to reproduce

• Head to a demo map, for instance Maps.Demo.XWiki SAS
• Enter "romania" in the search input
• Hit the full screen button
• Hit a facet filter, for instance "Location > Maps"

Expected result

The facet filter should get applied and the map stay in full screen mode.

Actual result

The map is displayed in non-full screen mode.

NB: if the user enters full screen mode and applies a filter only in a second step, then the "mfullscreen=true" parameter is added to the URL and the full screen mode is preserved afterwards.