Build a better multi-select handler

[mcmonkey4eva]

Feature Idea

Currently Select2 lib is used for multi-select dropdowns, and it kinda sucks, so replace it.

• Should have an interface visually and functionally similar to the normal dropdowns in Swarm (ideally reuse same code)
• Should allow custom orders (I think select2 has static ordering)
• No BS, just fire regular JS input/change events and all as usual
• Easily map down to a list of values

Other

No response