Fix TextSerializer to skip inline roots (like annotations)
Drop broken creation of a text/html version for the clipboard for now
Put custom data into drag handler instead of built-in nodes text extraction, concentrate mimedata export in new gui.MimeDataExporter
No longer needed to pass focus explicitely back for IE in synchronizeWindowSelection
Merge pull request #275 from kossebau/noAnnotationInPlainTextCopy

Enable simple cut, copy & drag of selections as plaintext, drop broken support for richtext variants