Add `legend = FALSE` argument to `plot_trace()`

[hanneoberman]

library(mice); library(ggplot2); library(ggmice)
#> Warning: package 'mice' was built under R version 4.3.1
#> 
#> Attaching package: 'mice'
#> The following object is masked from 'package:stats':
#> 
#>     filter
#> The following objects are masked from 'package:base':
#> 
#>     cbind, rbind
#> Warning: package 'ggplot2' was built under R version 4.3.3
#> 
#> Attaching package: 'ggmice'
#> The following objects are masked from 'package:mice':
#> 
#>     bwplot, densityplot, stripplot, xyplot
imp <- mice(nhanes, m = 50, print= FALSE)
plot_trace(imp)

^{Created on 2024-06-25 with reprex v2.1.0}