[1.1.6] Items do not show colour/other info in container tooltip

[Xorimuth]

- Create a spidertron with a colour, or connect a spidertron remote, or create a blueprint
- Place in container
- Hover over container
- Observe icons in container tooltip have the default colour/icon

This was fixed for items on the ground in 1.1 (https://factorio.com/blog/post/fff-362), so maybe this would be worth doing as well?

[boskid]

I am not considering this to be a bug. Container content for the tooltip does not render icons for particular items but it renders total counts grouped by the item ID, so the icon cannot use any particular item to change its color. If you would have 2 spiders, one red and one blue and tooltip would render icon of red spider with count "2" it would be an issue. Rendering all the items separately could solve this but then you would not get easy to read total counts.