[SA] Add icons for selector combinator in alt-mode

[Hares]

TL;DR

Selector combiator should have more alt-mode signal icons like ariphmetic & decider combinators.

What?

Currently, only those modes of operation support little signal icons:

• Select input (index)

Those modes of operation have no parameters (except perioud of update), so they do not need any extra icons:

• Random input
• Stack size
• Rocket capacity

However, these can benefit from adding icons:

• Count inputs -> Icon of output signal
• Quality filter -> Icon of quality, potentially with operator like for inserters
• Qualirty transfer -> Icon of item to transfer (top), Icon of quality transfer into / icon of control signal (bottom)
  OR: If direct selection is static AND target signal is wildcard, they can be merged into a single signal of yellow (EACH) wildcard with quality icon in the corner, like so:

  

  04-27-2025, 16-36-55.png (118.11 KiB) Viewed 126 times

  .

Why?

Currently, if you complicated setup regarding quality it is pretty impossible to determine which combinator does which without clicking on them.

No alt-mode:

04-27-2025, 16-58-13.png (292.82 KiB) Viewed 126 times

With alt-mode:

04-27-2025, 16-58-06.png (312.25 KiB) Viewed 126 times

And this is the easy setup.

See also

120131: [2.0.15] [SA] Selector combinator has the same icon for quality filter & quality transfer