Sort results also by the parent category name

[peterhil]

You might have many categories which have the same name, for eaxmple "Tutorials" for different programming languages.
To make things easier to find, sort the results first by the category name and then by the parent category name.

Edit:

Now the sorting actually works in tree order (the order the bookmarks are in) – and this could be made alphabetic.
The above sorting could be an option in the UI or preferences.