[For 1.8] Thank You/Like System v3.3.6 + MyAlerts support

[brad-t]

Could you please add a setting that enables users to like their own posts? This is mostly for UI consistency, in my case. Not having a like button on a user's post makes it less clear to a user that it can be liked; however, most users will just not like their own posts out of courtesy. (See: Facebook)