Disable specular peak by default, it is of intense comparing to the rest of the simulation

there was a reason why it was disabled:

with specular peak:

without:

Therefore, revert this change made in !2832 (merged).

changed milestone to %v22

assigned to @m.svechnikov

changed the description

agree

changed the description

mentioned in merge request !2858 (merged)

mentioned in commit e5db901b

closed with merge request !2858 (merged)