NLM computation progress bar not continuously moving

[scholbeck]

I noticed that the progress bar for the computation of the NLM is not continuously moving. It stays at 0% for a long time and leaps in big steps to 100% when computations are nearly finished.

Minimally reproducible example:

library(fmeffects)
library(mlr3verse)
data(bikes, package = "fmeffects")
forest = lrn("regr.ranger")
forest$train(as_task_regr(x = bikes, id = "bikes", target = "count"))

effects.bivariate.nlm = fme(model = forest,
                            data = bikes,
                            features = list("temp" = 5, "humidity" = -0.1),
                            ep.method = "envelope",
                            compute.nlm = TRUE)
```