Browsing Polish translation

This is written to the terminal in the ncurses UI when the window is
too thin to be usable; it's asking the user to resize the terminal
window horizontally. Since space may be extremely tight, try to be as
terse as possible (but we can wrap the text if possible, so don't be
cryptic). The '[' and ']' characters are just decoration to imply this
is a system problem outside the scope of the application, but they
aren't required.