Rename StopFlashBackground::setContentScript to addContentScript
Remove StopFlashBackground::setData()
Add StopFlashBackground::getCollection() + Fix StopFlashBackground don't send collection's id
Remove FlashCollection::requestChange() & use sendData directly + Send collection's id in FlashCollection::sendData()
Remove 'HaveChange' system & modify collection data directly without refresh all collections
Smalls fixs
Small fix