Wikivoyage pages have more than 3 related articles as they make use
of the {{#related:}} magic word.
After speaking with Nirzar we should allow this project to show more than 3.
This change allows this while keeping the existing behaviour on other wikis and
will pave the way for removing a bunch of code from this extension.
Additional changes:
* Cleanup skinStyles definitions
* Limit cards to 30% maximum width and give margin top to account for
situations where the number of cards are multiple of 3
** In Minerva hardcode the max-width to pixels.
* Margins are switched from hardcoded 10px to percentage based. Yes
this changes the right margin slightly but is more maintable and visually
the same.
Bug: T164765
Change-Id: I41119de3228c2df799f740d4bd00082101c21b97
I33936a3 didn't introduce a regression but highlighted an issue with the
fixture in the RelatedPagesGateway unit test: the fixture is in the
legacy JSON format despite the API request URL including
formatversion=2.
Change-Id: Id372d022625d88eea685267ea6b6484cf6b28cbc
RelatedArticles tries to load the 'ext.cards' module and if
it succeeds it continues with showing the related articles
on the page.
Dependency: I6661527175eb889cec4193b18fa18207f332b4fc
Bug: T117108
Change-Id: I33936a3e9cd5d1f0296e48fd1c2bba77fff4e466
