[widgets/test][plotterparameterseditor] Disable add parameter button on last parameter addition

2 jobs for 182_plotterparameter_editor in 27 minutes and 1 second (queued for 3 seconds)
Status Name Job ID Coverage
  Build
passed build_linux_36 #169335
docker-build

00:07:41

passed build_macosx_36 #169336
macosx

00:27:01