discriminate "Edit this page" by kind of input format

https://smart-grid-use-cases.github.io/docs/usecases/onenet/wecl-pt-03/: the link Edit this page leads to a broken link
The reason is that https://github.com/smart-grid-use-cases/smart-grid-use-cases.github.io/tree/master/content/en/docs/UseCases includes only PlatOne (i.e. only these use cases are written in Markdown)
Change the link to Edit this use case
Discriminate it by type of input file (Markdown, Excel or XML), pointing to the correct repository for each type of input

smart-grid-use-cases / smart-grid-use-cases.github.io