* Fix theme builder not loading corresponding
  SVG file
* Fix copyright year
* Cleanup default SVG file
* Revert SVG file and simplify it again using an additional
  option that keeps the style="..." attribute instead
  of replacing it by multiple fill="..." stroke="..."
  This way it will be shown correctly after being
  edited in Inkscape. Inkscape adds a style="..."
  attribute when edited and leaves the fill,stroke
  attributes. When the file is loaded by Qt SVG
  module, the fill,stroke attributes take precedence
  over style attribute so the appearance in Inkscape
  is different from what is rendered by Qt.
* Add ability for theme builder to load and reload
  SVG file when is is edited by an external program