Modify overview-sections

describe important terms and introduce structure of subsections

added 1 deleted label

assigned to @brunst--tu-dresden.de

@mflehmig--tu-dresden.de Add to content rules: Overview page with same name as section

assigned to @mflehmig--tu-dresden.de and unassigned @brunst--tu-dresden.de

Closed with commit #be390f04

closed