[plotters] Fix mutating ordered dict while iterating

6 jobs for dict_mutation_fix in 27 minutes and 37 seconds (queued for 7 seconds)
Status Name Job ID Coverage
  Build
passed build_linux_27 #135623
docker

00:05:11

45.0%
passed build_linux_36 #135624
docker

00:04:55

45.0%
passed build_macosx_27 #135625
macosx

00:10:36

45.0%
passed build_macosx_36 #135626
macosx

00:10:12

45.0%
 
  Docker
passed docker_linux_27 #135627
docker-build

00:16:59

48.0%
passed docker_linux_36 #135628
docker-build

00:16:35

48.0%