rework the manual to remove index with only 1 file

Hello,

we have some part of the manual where we have index with only one file this must be remove and have the text directly when we click on it

https://fusiondirectory-developer-documentation.readthedocs.io/en/1.4/license/index.html

https://fusiondirectory-developer-documentation.readthedocs.io/en/1.4/translate/index.html