Incorrect Structure Part content displayed on backend

[JimmyAustin]

At the moment the name of each structure item displayed on the backend will change randomly. Basically if you have a structure with 3 different parts (say, name, description and date), the side selector for the structure will choose 3 different random parts to use on the sidebar. This looks like it might be due to line 12 in _form.html.haml

= structure_item.structure_parts.first.try(:structure_partable).try(:content) + 'test'

The structure parts will return in a random order from the database, so getting the first of the array will return a random object. A hacky fix can be implemented by adding in a order like so

 = structure_item.structure_parts.order("created_at asc").first.try(:structure_partable).try(:content) + 'test'

But ideally it should look at the structure definition in the theme initializer and use the content of the first path.

Let me know if you need any clarification.

[Bramjetten]

It currently tries to get the content of the very first structure partable that's created. Often this is a Spina::Line. The build_structure_parts method in pages_helper.rb initializes all these parts in the order of the theme initializer. We should probably look for a way to do the same for the name of each structure item.