refactor commentPreview.onTextareaInput from attach*Preview
update comment live preview for automatically quoted text

reddit added "quote selected text" functionality when user clicks reply

fixes #632
Cleanning a little with baseStyleProtection
Add cssPrefix function
Protection again transform

for exemple scaleY(0)
Merge pull request #1060 from matheod/transformProtection

Transform protection
Merge pull request #1056 from andytuba/commentPreview

Live preview: update on quote and a little cleanup