Implement insert(Un)OrderedList, indent/outdent.
Merge branch 'develop' into feature/insertOrderedList
 - Extract func.peq2.
indent lang `sk-SK` file.
Merge pull request #590 from HackerWins/feature/insertOrderedList

Implement insert(Un)OrderedList, indent/outdent.
Extracting `typing.js` (tab, insertParagraph) from `Editor.js`
Merge with upstream develop branch