SlyEdit: UTF-8 support in the displayed header and when quoting text and when quoting message text. This also includes a dd_lightbar_menu.js update

SlyEdit: UTF-8 support in the displayed header and when quoting text and when quoting message text. This also includes a dd_lightbar_menu.js update (filling in the remainder of item text if it ends up too short; may be a bit hacky, since it seems UTF-8 characters can be 2 bytes and some methods of getting string length don't seem to account for that)