fix(29918): clear toast before publishing again

[vanch3d]

See https://hivemq.kanbanize.com/ctrl_board/57/cards/29918/details/

The PR introduces a hack aiming at avoiding duplication ot toast with the same id (with the effect that they cannot be dismissed)

Out-of-scope

• A better approach will be to disable the "publish" button until the toasts are cleared by a timeout or when the problems flagged up by the error toasts are resolved. The latter solution is implied with the delivery of a "validity report" but requires tighter integration with the REST API request. It might be done in a further ticket
• The id created for the toasts assumes a single instance (otherwise they face a duplicated key error). A bug is currently preventing resources from generating their own toast so that assumption is still holding. This bug will be fixed in a subsequent ticket.

Before

After