Make embedded images behave as bbc img
Make embedded images behave as bbc img

Align behaviour between embedded image attachments and bbc img.
Show in real size with responsive layout when width and heigh are
not specified. If width och height is specified the image
will be shown in that size with the option to resize to full size
when clicking.

Signed-off-by: 01e908796ff33b2313d28eb51e927f3fdf828dbd@gmail.com

StealthWombat/SMF2.1-more-forkery,StealthWombat/SMF2.1-more-forkery