Return internal projects in PersonalProjectsFinder

When getting the projects of a user we should get the public _and_
internal projects, not just the public ones.

app/finders/personal_projects_finder.rb

@@ -26,7 +26,7 @@ class PersonalProjectsFinder
     authorized = @user.personal_projects.visible_to_user(current_user)
 
     union = Gitlab::SQL::Union.
-      new([authorized.select(:id), public_projects.select(:id)])
+      new([authorized.select(:id), public_and_internal_projects.select(:id)])
 
     Project.where("projects.id IN (#{union.to_sql})")
   end
@@ -34,4 +34,8 @@ class PersonalProjectsFinder
   def public_projects
     @user.personal_projects.public_only
   end
+
+  def public_and_internal_projects
+    @user.personal_projects.public_and_internal_only
+  end
 end