Add logging for unexpected technology names in data

[MonikaFu]

          NB (and not so related to this PR):

We should probably add logging in case the technology types input to the dashboard are not considered in plot_styles.css. I don't have a better way of doing this in mind, but can imagine that it might lead to some odd bugs in case data isn't as expected, and at the very least we should make it easy for ourselves to debug

Originally posted by @jdhoffa in #57 (comment)