Manage a cache for MDUI logos
Currently, when SAML metadata include logos within MDUI extensions, the DS adds a "logo" attribute to the "option" HTML elements. This leads the web client to download all the logos from different sources. This can bring 1) performences issues (as a federation grows) and 2) privacy issues (the home organization webmaster could track SP usage globally).
The DS could maintain copies of logos, on server side, to lower these inconveniences.