Code optimisation: social_comment_comment_links_alter

Problem/Motivation

When the entity isn't a post comment "extra checks" take place. These extra checks are potentially going to load all the Group Content of the entity which can be a lot, then it's going to loop on all that loaded group content to check permissions. This can probably be done differently in a better optimised way.

Proposed resolution

Use 'break' statement to stop altering at first encounter of permission conflict for a group.