Development plotting message unclear

[nikolai-b]

The lines are not redrawn - sorry about it @nikolai-b

Two things confused me:

1. The plotting message saying that they are redrawn. I know they're used for local testing, but with messages like Plotting top 30 straight_lines took for straight_lines is slightly confusing.
2. The loading circle - which is a minor issue.

thanks!

Originally posted by @usr110 in #798 (comment)