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* Description in the context of images is now called 'Caption' in the frontend * Images now have an 'Alttext' field, e.g. for non-displayed assistive technologies. * Hierarchy : 1. altiscaption is true, then alttext (whether empty or not) 2. altiscaption is false and caption is not empty, then caption 3. altiscaption is false and caption is empty, then title - add 3 new columns to artefact_file_image table - ability to save bool for if image is purely decorative - saves alt text - saves bool for if alt = caption - for linked images, the <A> tag wraps around the image and the caption, so that if the alt text is empty (when description is same as alt), the link has a label for screen readers - added <figure> and <figcaption> when 'showdescription' is on - deleted thumbnails.tpl as it is not being used anymore - tidied up square thumbs so that caption will avoid being cut off - add help text for isdecorative, alttext, and altiscaption fields - added a 'show caption' to image formatting options' when adding image via TinyMCE so that it can have a caption Change-Id: I80c2d62e45bb08d59b6f8d3033a113fcd30ae9a7
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