dialog_close
Closes a dialog. When there is no dialog open then nothing happens.
Example, closing the top-most dialog:
{% button text="cancel" action={dialog_close} %}
This button closes any open dialog when clicked.
There can be many levels of dialogs open, they are designated by a level, the default dialog opens at level 0. Higher levels are displayed above lower levels.
To close all open dialogs, pass level 0:
{% button text="cancel" action={dialog_close level=0} %}