avoid multiple invocations of citeeditor manipulate wrong sourcedescription
allow plugins to trigger store event
trigger store after events modify the content
clean values before anything else in case of cancel
remove spell highlight before entering plaintext mode
remove spellcheck marker before triggering actions from any toolbar item
store after recalculating & setting the html
avoid default escape key handler, as in my scenario this would be fatal
make plaintext full-window active to work in large scrolled documents
remove spellcheck marker when keys are pressed that are likely to manipulate lines
prevents dissorted views, but not all