TinyMCE, Gallerybox, Image, Text

* TinyMCE: forced root block (<p>...</p>)  to ensure the dropcap and
liftnote styling is applied
* Gallerybox adds row-no-border-right class to its row
* Gallerybox uses new propertyname convention to get the imageid
* Image widget no longer has checkbox "image_border"; this property is
now merged with image-border_size, value "none".
* Text widget; image_icon (checkbox) property is merged with
image_border_size ("none")
* Text widget; additional warning if button text is set, but no url is
specified