…hange the html that is being set/get.

Moved the extension init before the addElements method to allow
extension hook into the setContent and getContent. Because of the move
the elements are not available in the extension init method, the
extension should subscribe to the add addElement and removeElement
events.

Always enable toolbar when not disabled in options, even when all
elements on page have data-disable-toolbar set, it is possible that
elements are added later that require the toolbar.

…extensions to update the editable html.

tests needed an update because the innerHTML of the content editable was
replaced after init.

… created after a enter to a p tag, this is now catched.

Fix for when applying block formatting when on a list item, it will
remove list formatting first.

fixed issue yabwe#1348