Different styling stuff

[aladwani]

• 
  line break for lists
• SidebarNav Header change to Thilo Online for now
• Exchange "Erste Hilfe with negative one"

[bodobraegger]

@jimmylevell: sidebarnav header title would be good to have a translation for already, same with the home page title #131

[bodobraegger]

• I need to implement the sidebarnav to use the same imagery as the section icons