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a26ce2482a
We add a new theme config so the theme can say it supports font-awesome. If this is true, the pix_icon renderer will call a mapping function to map from the moodle style t/edit to a font-awesome style fa-cog icon name. Then the renderer will either render an image tag for old icons - or an accessible font-awesome <i> tag. This mostly works - but there are some places where we don't use the pix icon renderer, and we directly create image tags with pix_url image sources. These will need updating (Atto icons, drag and drop move icons, editpdf icons).
