plot_scalar_results looks for key label in related scenario yaml and replaces plot label, if it can find one.
If it fails to find a label, original scenario name is taken.
Added label to scenario _2050-eleff for testing purposes.
Tested with snakemake -j1 results/joined_scenarios/all-optimized/joined_plotted
plot_scalar_resultslooks for keylabelin related scenario yaml and replaces plot label, if it can find one. If it fails to find a label, original scenario name is taken. Added label to scenario _2050-eleff for testing purposes. Tested withsnakemake -j1 results/joined_scenarios/all-optimized/joined_plotted