The address format list had an entry per network, and Pezkuwi, Zagros
and Bizinikiwi all use prefix 42, so it showed three options with the
same value; choosing one could not be told apart from the others.
prefixOptions keeps one option per prefix and lists every network
using it in its text. ui-settings gets the tsconfig.spec.json the
other packages with specs have, so the build leaves the spec out.
Satoshi Qazi Muhammed