Should not be able to proposing Major Incidents if lower than a P2

[SubithaM]

@Ankur Bawiskar 

If Incident is P3 or P4 or P5 Propose major incident button should not get visible. I made changes in Propose Major Incident UI Action in condition as "(new sn_major_inc_mgmt.MajorIncidentTriggerRules(current).canProposeMIC()) && (current.priority == 1 || current.priority == 2)". In my instance If I set Impact as 1-Critical and Urgency as 1-Critical "Propose Major Incident" popup page will get appear. If I click Propose button after providing required fields it shows as "Action not authorized" and the incident is not saving. 

Could you please help me on this.

Thanks in Advance !!