plot_heatmap: Placement of legend

[adomingues]

Hi @arnesmits ,

Is there a way of placing the legend of the heatmap (plot_heatmap) at the bottom? Right now it is hard coded to be on the top of the plot: https://github.com/arnesmits/DEP/blob/RELEASE_3_9/R/plot_functions_results.R#L484

I tried to change the settings but didn't managed to get it working. The plots are already nice, but I wanted to add a title and it becomes quite busy at the top. Cheers