Description of problem:
when installing from ftp in graphical mode and have typo in path,
anaconda tell me that do not read headers
there is no option to correct the ftp path
in text mode anaconda correctly say, that path is bad
i.e 
ftp.example.com
bad /pub/fedora/core/test/SOMETYPO/1.92/i386/os
good /pub/fedora/core/test/1.92/i386/os

Version-Release number of selected component (if applicable):
from install fct3 (rescuecd.iso)

How reproducible:


Steps to Reproduce:
1. install from ftp in graphical mode
2. typo in ftp path
3. next, next, next ... -> anaconda cannot read headers
  
Actual results:
i cannot fix typo in ftp path

Expected results:
back and correct typo

Additional info: