As all kernel skins are purple,

• commit the purple theme in the frontedit
• remove it from skin workspaces
• add the xsl to load it from all intranet skins + workspaces
• break compatibilities (not breaking finally, the biggest risk is to have blue on workspaces - old frontedit but new skin workspaces)
• doc the way to go back to blue theme
  OR change the default blue color by purple and remove it from workspaces