Add images to legend explaining what each type is

[Robinlovelace]

Very few people will know what these are from the off:

[mem48]

I expect @mvl22 or @johnparkin28 will have a collection of photos that we could have pop up when you click on the legend

[mvl22]

Useful images added in bbc363c.

I'll add support in the LayerViewer library to enable image overlays for auto-legends.

[Robinlovelace]

Sounds great, will be really useful to have archetypes of each infrastructure type. More basic issue: the diversity of types of Recommended Infrastructure in Bristol seems to be much lower since the UI revamp. Could you take a look and confirm @mem48? This screenshot also reminds me of another thing: the lines are too intense and should have a lower opacity, or something like 0.7 perhaps. Great work in any case.

[mvl22]

the diversity of types of Recommended Infrastructure in Bristol seems to be much lower since the UI revamp

That was a bug, now fixed. See: #5 (comment)