Allow setting of "Prefer links over sources" per site

[taladar]

On some sites it is useful to have the page title of a gallery page available for rename rules so I want to prefer links (or it will save the thumbnail instead).

On others the link leads to the next image, there I would prefer to use the source URL.

[gyng]

I've added an option to do this in v3.4.0, under Behaviour > Prefer links for pages and Behaviour > Prefer links for pages > URL filters.

It checks against a list of page URLs instead of the title as that's much easier to do.