This view includes a subform which defines a relation n-n with the table
tx_maps2_domain_model_poicollection of the extension
This table is defined as an existing table. The fields are, by default,
set to the type
Show Only by the Kickstarter.
Because we want to enter points of interest from the frontend of the extension, the property updateShowOnlyField is set to 1.
updateShowOnlyField = 1;