Refactor: Edit UI Formula Designer / Field-Settings - simplify with signals (internal)

[iJungleboy]

I'm submitting a

[x] refactor request

...about

[x] edit experience / UI [x] formulas

Current Behavior / Expected Behavior

Formula designer uses a lot of observables, and the code could be made much simpler using signals.

Your environment

• 2sxc version(s): 18.00.00