2.8.0 release bugs (PR#13210)

Dear colleagues,

Using the last release 2.8.0 I had (for the first time since working with R)
the difficulties in transmission of some Central European letters (=B9=F0=
=E8=E6=BE)
from R editor to the console and graphic window. They appear correctly in
commands in R editor window, yet after executing ctrl R, they have been
transformed to other codes or blanks (in console and graph devices).=20=20

No such troubles have ever met using previous releases. How this can be
explained?

Thanks in advance,

Janek Musek