When adding an entry to a map property, the handling for saving the entry is different for literal values than for tosca function values.
Tosca function values are persisted when the tosca function modal exits.
Literal values are not persisted until the 'Save' button is clicked.

This story is to introduce consistent behaviour. The values should not be persisted until the 'Save' button is clicked, regardless of how they are set. When the 'Save' button is clicked, all the entries added shall be persisted