Now Based on Simple White X

Because the original Simple White hasn't been updated in a long time, this compact fork is now based on the actively developed Simple White X.

• Numerous bug fixes
• Parting from the original Simple White, the Options page, about:preferences, is revised to resemble the Add-ons Manager page, about:addons.
• There is a new icon different to the options icon for the Advanced options.
• The links in Firefox about: pages, e.g., about:addons, will not be underlined unless the pointer is on them.
• A few more about: pages are revised to make the style more uniform (e.g., the content is shown within a frame with a light gray background).
• about:privatebrowsing will have a more sober appearance than the default theme in Firefox 42+.
• The theme is now compatible with rtl locales. Besides general corrections, specific corrections where done for the about:newtab page and also for the about:preferences page. However about:home cannot be corrected with the theme. Those using Stylish may use this style to correct that page until Firefox is patched properly.
  The theme supports colored tile bars in Windows 10 thanks to an patch by @lychichem.
  The Animations tab in the Inspector module of the Developer Tools is fixed.