Customize help page to match the new MetaGer design

• Settings:Linkmaker
• Settings:Blacklist
• Settings: how to do
• Settings: how to reach --> new menu entry
• Settings: Citations On/Off -(how)
• Open result: Same TAB vs other TAB
• Open result: change wrong entry text
• Section: "Searchfield" --> change to section: "start page" and add entry: "Install MetaGer"