[bisq-network/bisq] Add dropdown autocomplete on Market, Buy, Sell tabs (#3139)

[battleofwizards]

The exceptions should now be fixed. The ComboBox was basically rewritten and now works with its own cloned list to avoid cross-thread sharing. The CoboBox list still gets updated on tab activation. Items should be fresh.

The specific UX glitches found by @ripcurlx are worked around. Not strictly fixed but made less relevant. Some UX imperfections remain but I do not feel like I can improve this any further. At least not this time around. My recommendation is to merge as-is b/c it is strict improvement over no autocomplete at all.

**Ready for review!**

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