(bug 22209, bug 22574) Make indent, bullet list and numbered list buttons in the WikiEditor toolbar act on each line individually
* Reintroduce support for the splitlines argument in encapsulateSelection(). Was implemented by Adam Miller in r61493 but got lost somehow
* Add 'splitlines': true for the bullet list and numbered list buttons. The indent button already had it, so that part of r61493 did survive
* Copy options.pre and options.post to local pre and post variables instead of using (and modifying!) them directly all over the place