Add sprite specific inputs to the IconSelector

[KaiVolland]

Description

It would be nice to enhance the IconSelector with inputs for handling sprites.

There are several options to ehance the usage of sprite data within the IconSelector

1. Show the sprite base image and mark the selected icon with a box
2. Allow to drag the box or switch between the icons (button click moves the box width pixels to the right)
3. Add mapbox specific inputs
   3.1. Fetch the sprite metdata json and automatically split the image into single icons as specified by the json

Example

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Alternatives

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Additional Context

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