mini-thumbs for images in graph view (making them 'relevant')

I mentioned this before, but can´t find this on the go: it would be good if images would get a mini-thumb-view representation in the graph.

Two underlying reasons:

• One of the strengths of the true strengths of Capacities is its power to interlace multimodal information/content. Making images generic icons and text labels loses that
• The real value of images (where they are used as knowledge, not as illustration!) is in

– This proposal follows the call to specify anything on improving the graph after its last general overhaul (– which btw was very welcome + productive! ✨)