worksheet: copy text to right editor
prevent sheet evaluation
MacrosheetFileHook, 2 editors sync
syntax highlight in macrosheet, action on gutter icon
macrosheet refactoring: separation from worksheet
macrosheet refactoring done
correct expansion stub
autocopy with delay, correct expansion | beta done
tooltip fixed + removed some dead code
Merge pull request #1 from ibogomolov/macrosheet

implementation of interactive expansion for Scala macros