Link summary related

[Dorus]

A list of nice-to-have things:

• A changelog
• The link from the PR to the issue that it fixes. -> Not a direct fix, but this is work towards better link visualization to aid Drag links when item is dragged #409, Improve link summary screen to show other linked and unlinked recipes for the same item #414
• A description of what testing was done.
  I clicked around on the new unrelated links and you navigate to new links from there.

As a followup to #408 this is still WIP but i still wanted to share:

As seen above, the link summary now not only display the currently selected link, but also recipes from other links covering the same recipe.

[DaleStan]

A couple thoughts from looking at this:

• The new header says "Related links", but it displays related recipes instead. I'm not sure which you intended, but they should match. (Also, the new header should be drawn with (TextBlockDisplayStyle)Font.subheader or Font.productionTableHeader)
• Clicking on a related linked recipe didn't do what I expected, but now that I understand what it's doing, I think it's correct.