add lift to actually update param values on ui change

scripts/main.jl

@@ -22,6 +22,9 @@ params = (
 )
 
 params_obs = Observable{Constants.CombinedPDEParams}(CombinedPDEParams(N, dx, params.Du[], params.Dv[], params.F[], params.k[], params.ϵ[], params.a[], params.b[]))
+lift(params.N, params.dx, params.Du, params.Dv, params.F, params.k, params.ϵ, params.a, params.b) do N, dx, Du, Dv, F, k, ϵ, a, b
+    params_obs[] = CombinedPDEParams(N, dx, Du, Dv, F, k, ϵ, a, b)
+end
 
 U = ones(N, N)
 V = zeros(N, N)