more descriptive help texts on project
more descriptive help texts on project

We need to make sure that these help texts are correct for all projects.

Fixes https://github.com/liqd/a4-meinberlin/issues/824 and
https://github.com/liqd/a4-meinberlin/issues/823

liqd/adhocracy4,liqd/adhocracy4,liqd/adhocracy4,liqd/adhocracy4