Fix external links in the sidebar

[HuidaeCho]

This PR fixes external links starting with https:// in the sidebar.

[schettino72]

uhmmm. not sure about this. The whole point of using pathto is to let sphinx handle that. Are you sure there is no configuration to control that?

can you show a sample code to reproduce the problem?

[HuidaeCho]

can you show a sample code to reproduce the problem?

Sure. Please try this: https://github.com/HuidaeCho/projpicker/blob/main/docs/source/getting_started/index.rst

or https://github.com/HuidaeCho/projpicker/blob/main/docs/ if you need the entire documentation.

[HuidaeCho]

Checking https://www.sphinx-doc.org/en/master/templating.html, pathto() is for internal links only, I think. I think there must be a better and cleaner solution. The sphinx_rtd_theme doesn't have this problem.

pathto(document) Return the path to a Sphinx document as a URL. Use this to refer to built documents.

[schettino72]

fixed on 3bf0ba2

I did the check similar to what pathto and put that logic on python code. Instead of templates.
Thanks for the report and patch