Set "errdhotfocus" to a higher contrast color combination. Yellow is barely
visible on lightgray. The cursor stands on the the focused hotkey. If the
cursor is an underscore, the high contrast is obviously needed. If the focus
is a full box, it normally inverts both the background and the foreground, so
poor contrast remains poor. Red on lightgray is consistent with other colors
of the skin.
Set "menutitle" to yellow on blue. Otherwise, the title is not
distinguishable from the menu entries. Both "parent" skins, default and
xoria256, use distinctive color for the popup menu title.
Set "editrightmargin" to the same color as the panels. White on blue is
extremely distracting in contrast to black background to the left of the
margin.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>