Only use _blank on external richtext links

[buddh4]

Is your feature request related to a problem? Please describe.

All richtext links use a _blank target. We should only use blank target for external links. Somehow we need to detect file links or prevent pjax in certain cases.

[timaschew]

It's even not possible to explicitly set relative links to /s/my-space or anchors #section-a.

Everytime https:// is prepended automatically.

[ArchBlood]

It's even not possible to explicitly set relative links to /s/my-space or anchors #section-a.

Everytime https:// is prepended automatically.

See #61

[marc-farre]

@luke- Should we close this issue?
However, the fix has not been released yet: https://github.com/humhub/humhub-prosemirror/blob/develop/docs/CHANGELOG.md -> Enh humhub/humhub#61

[luke-]

@funkycram Let's leave it open until the release, I hope that after v1.14 we can continue to work on that and finally release version 2.0.