Feature #161: add a parametere to set the default underline color.
Usage: lemonbar -Ucolor
By the way this also fix a strange behavior where '%{+u}correct%{U-}strange'
made the second underline of the same color as the background instead of the foreground.
This was because underline color is set to fg color at initialisation but %{U-} was setting the underline color to the default bg color. So with a default underline color this behavior disapear.
Feature #161: add a parametere to set the default underline color. Usage: lemonbar -Ucolor
By the way this also fix a strange behavior where '%{+u}correct%{U-}strange' made the second underline of the same color as the background instead of the foreground. This was because underline color is set to fg color at initialisation but %{U-} was setting the underline color to the default bg color. So with a default underline color this behavior disapear.