NoHeader variable is not recognized in Regional-URL view

[floriandrott]

Describe the bug
The Regional view is not recognizing in the URL the "NoHeader" variable. Setting "NoHeader" to 1 or 0 does not take any affect.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://bahn.expert/regional/N%C3%BCrnberg-Schweinau
2. Modify the URL to https://bahn.expert/regional/N%C3%BCrnberg-Schweinau?noHeader=1
3. Reload page
4. Header is still displayed

Expected behavior
Header is not shown anymore.

Desktop (please complete the following information):

• OS: Mac
• Browser Chrome
• Version latest

Additional context
It seems like that in

bahn.expert/src/client/Regional/index.tsx

Line 29 in 6e16487

 <RegionalRoutes /> 

the functionality is missing compared to

bahn.expert/src/client/Abfahrten/index.tsx

Line 31 in 6e16487

 {!noHeader && <Header />}