LPS-31740 As a site administrator I can check the status of propagation for for page / site templates and request propagation explicitly when necessary

Hi Brian,

I've added the permission checking. @JorgeFerrer and I think that we should remove the permission checking from the EditLayoutAction class so that it is performed in the remote services or in some specific cases in Util classes. For this task, I've done it so for the reset and merge actions. If you agree I can open a new task to refactor all other actions.

Reviewed by @juliocamarero