Going to help or docs using user menu on mobile changes internal route
Steps to reproduce
What happens?
A new tab opens with the documentation, but in the funkwhale tab a new route is being loaded, which leads to a 404
What is expected?
Only a new tab opens
Context
I guess the issue was introduced here: https://dev.funkwhale.audio/funkwhale/funkwhale/-/blob/develop/front/src/components/Sidebar.vue#L695
Since we are using a <a> tag to go to a normal link, a new route gets pushed even though this does not make sense for external URLs. I am not sure why we introduced it.
Funkwhale version(s) affected: develop