WIP - Migration for leave-c permission

server/startup/migrations/v107.js

@@ -0,0 +1,10 @@
+RocketChat.Migrations.add({
+	version: 107,
+	up() {
+		const roles = RocketChat.models.Roles.find({
+			_id: { $ne: 'guest' },
+			scope: 'Users'
+		}).fetch().map((role)=>{ return role._id; });
+		RocketChat.models.Permissions.createOrUpdate('leave-c', roles);
+	}
+});