STORM-261 FIXED Changed line number color in script editor.

- Changed text_readonly_color in script editor to darker gray, so that line numbers are visible when scrip editor is out of focus.

indra/newview/skins/default/xui/en/panel_script_ed.xml

@@ -141,6 +141,7 @@
      layout="topleft"
      max_length="65536"
      name="Script Editor"
+     text_readonly_color="DkGray"
      width="487"
      show_line_numbers="true" 
      word_wrap="true">