Add / Set Group Sherpas

Group Sherpas can now be assigned for your group. They will display on the right hand side of the main group page. Only these members will show a "Shepa" badge (if they have one) when joining games posted in the group or searching the members list.

Group Sherpas must be assigned by the Group Moderators can assign the Group Sherpas under the members page, clicking the gear icon on the user they want to promote, then hitting "promote to sherpa"