Logo now displayed on "/role/ds.s" search for ra21 template

[peppelinux]

Hi with this PR now I can get displayed the logo of the entities during ds-search, as follow:

This is also related to #150 and hopefully fixes it.
I'm sure that this is a work in progress in other branches but they are too much that I preferred this pratical way. Consider me in listen for any ideas and suggestions that would come to this result

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[leifj]

This is a prefectly valid PR but I'm not going to merge it anyway since the code it refers to is about to be deprecated and has already been moved out into theidentityselector/thiss-js