create small subtemplates for each block und apply new breadcrumbs logic

web/app/corpora/events2.py

web/app/templates/_colors.html.j2

web/app/templates/_footer.html.j2

web/app/templates/_navbar.html.j2

web/app/templates/_roadmap.html.j2

web/app/templates/_scripts.html.j2

web/app/templates/_sidenav.html.j2

web/app/templates/_styles.html.j2

web/app/templates/admin/_breadcrumbs.html.j2

web/app/templates/admin/edit_user.html.j2

web/app/templates/admin/user.html.j2

web/app/templates/admin/users.html.j2

web/app/templates/auth/_breadcrumbs.html.j2

web/app/templates/auth/login.html.j2

web/app/templates/auth/register.html.j2

web/app/templates/auth/reset_password.html.j2

web/app/templates/auth/reset_password_request.html.j2

web/app/templates/auth/unconfirmed.html.j2

web/app/templates/base.html.j2

web/app/templates/corpora/_breadcrumbs.html.j2