Separator Line label in note input bar looks bad

In the menu to customize the Note Input bar, the label for separator lines looks rather amateurish; it is the following string: "------- Separator line -------", with the hyphens seeming to be meant to constitute a horizontal rule. It would look much nicer if instead of hyphens, true horizontal lines were used so that they could be thinner, be unbroken, end an exactly equal distance away from either side of the menu item (rather than the approximate centering provided by multiple hyphens), and overall look like less of a hack.