The cluster will loose fencing, when a user runs e.g. `pcs stonith sbd disable` and no other fencing mechanism is configured. The user should be warned about this.

Please, check if fencing will be lost after actions that can lead to it. Send forceable error if such situation can happen.

This issue can be complex (it is necessary to check sbd and also fence device commands). So, this problem could be solved by planning and creating separate JIRAs for each subtask.