Remove default of opening links in new tab in markdown content

[owenconti]

Fixes #3473
Remove default of opening links in new tab in markdown content

[webron]

@owenconti The opening of links in a new tab is the expected behavior. #3473 is talking about something a bit different - local links should not open in new tabs - that is, other anchors in the same instance of swagger-ui, should just jump to those anchors. However, I'm not sure our markdown parser generates those anchors in the first place, making this a harder problem to solve.

[owenconti]

@webron Wouldn't it be more user friendly if we gave the user the choice of opening in a new tab or not? If we do that, we can handle the local links without any issue.

[webron]

Even if we do, there's a difference between local links and external ones. It never makes sense for local links to open in an external tab.

As for external links - we used to open them in the same tab, but due to (very) popular demand, implemented the opening in a new tab. It makes sense - if you navigate away from the documentation every time, it can break the flow.

[owenconti]

I don't see how we can solve/add local links unless we remove the automatic addition of _target="blank" to all of the links in Markdown content.

Closing this PR.