cex_bar_titles in PlotCombinedMap is not used

Hi @erifarov and @aho,

Sorry for opening an issue too soon after the new release.

I have just realised that cex_bar_titles (the parameter that controls the size of the titles in the color bars) is not used in PlotCombinedMap(). It should be used in lines 221 and 397 in https://earth.bsc.es/gitlab/external/cstools/-/blob/master/R/PlotCombinedMap.R, replacing title_scale = 1 with title_scale = cex_bar_titles.

I have checked and it works with these changes. I will open a merge request.

Best regards,
Carlos