Currently the Designer Live Preview functions as follows:
- On activating the toggle, a list of all existing resources are retrieved from Connect and stored locally.
- When changes are made to those resources, they are updated in the UI on browser refresh.
- If any new resources (a newly configured layout, for example) are added after the toggle is enabled, these are not taken into account on refresh.
- Similarly, if any layout or configuration is reverted to its original state, refreshing the browser will remove this configuration entirely (404 not found).