2.6.3

Improvements:

• a few improvements to some internal functions which leads to better
  performances in big files.
• add file_size_limit to FileManager, when the file size is bigger than the
  limit, syntax highligher will get disabled
• Improve plasma 5 integration (will use more icons from theme (
  code-variable, code-function,...))
• Simplified color_scheme api, SyntaxHighlighter.color_scheme now accepts
  a string instead of a ColorScheme instance

Fixed bugs:

• Fix Ctrl+Home (jump to first line)
• Fix copy of directory in FileSystemTreeView
• Fix file watcher notification when saving big files.