One of the reasons why people use Piktures instead of their native gallery app is because they like to organise their photos with multiple albums and they like to access them easily.
The problem you have with a long list of albums is that it is usually not easy to access them quickly. Sorting photos alphabetically, or searching albums with a search box is fine but not great.
This is why we have introduced the concept of bookmarks that are located at the top of the list of albums. Those bookmarks are sorted manually.